# Open Source Shared Calendar Servers

> Search results for `open-source calendar server for sharing schedules across devices` on awesome-repositories.com. 114 total matches; showing the first 50.

Explore on the web: https://awesome-repositories.com/q/open-source-calendar-server-for-sharing-schedules-across-devices

**Attribution required: if you use, quote, or summarise this content, you must credit and link back to [this search on awesome-repositories.com](https://awesome-repositories.com/q/open-source-calendar-server-for-sharing-schedules-across-devices).**

## Results

- [awesome-selfhosted/awesome-selfhosted](https://awesome-repositories.com/repository/awesome-selfhosted-awesome-selfhosted.md) (299,516 ⭐) — This project is a community-curated directory of open-source software designed for deployment in private server environments and home labs. It serves as a comprehensive resource for discovering independent, self-hosted alternatives to mainstream cloud services, enabling users to maintain full data ownership and control over their digital infrastructure.

The directory is structured through a hierarchical taxonomy that organizes a vast collection of applications into logical categories, ranging from media management and data analytics to private communication and team productivity tools. It dis
- [elie222/inbox-zero](https://awesome-repositories.com/repository/elie222-inbox-zero.md) (10,101 ⭐) — Inbox Zero is an AI-powered email automation platform and inbox organizer. It uses large language models to automatically categorize, label, and archive emails, while providing a conversational interface for managing workflows and drafting responses through natural language.

The project distinguishes itself by integrating real-time calendar availability into its drafting process and generating AI-summarized meeting briefings. It supports a pluggable AI provider interface with model fallback chains, allowing it to connect to various cloud or local LLM providers. Users can also control their in
- [dkhamsing/open-source-ios-apps](https://awesome-repositories.com/repository/dkhamsing-open-source-ios-apps.md) (50,744 ⭐) — This project is a comprehensive directory of open-source iOS applications designed to serve as a technical reference for developers and learners. It functions as a curated index of mobile software, categorizing projects by their functionality, implementation language, and architectural design to provide a clear view of how professional applications are structured.

The repository distinguishes itself by offering a deep dive into mobile app architecture, allowing users to study real-world codebases that utilize patterns such as Model-View-ViewModel, VIPER, and Clean Architecture. It highlights
- [calcom/cal.com](https://awesome-repositories.com/repository/calcom-cal-com.md) (45,760 ⭐) — Cal.com is a comprehensive scheduling infrastructure platform designed to manage availability, booking workflows, and calendar synchronization across multiple users and external services. It provides a backend service for automated appointment scheduling, enabling the creation, confirmation, and management of booking lifecycles through a centralized state machine. The platform also offers embeddable user interface components that allow developers to integrate interactive booking experiences directly into third-party websites.

What distinguishes the platform is its extensible app ecosystem and
- [gam-team/gam](https://awesome-repositories.com/repository/gam-team-gam.md) (4,206 ⭐) — GAM is a command-line tool for administering Google Workspace and Cloud Identity. It translates command-line arguments into structured API calls, enabling administrators to manage users, groups, organizational units, and domain settings across a Google Workspace environment. The tool handles authentication through OAuth2 flows, service accounts, and workload identity federation, and supports multi-tenant configurations for managing multiple domains or cloud projects from a single installation.

GAM distinguishes itself through its batch processing and automation capabilities. It can process la
- [dokploy/dokploy](https://awesome-repositories.com/repository/dokploy-dokploy.md) (34,901 ⭐) — Dokploy is a self-hosted platform-as-a-service designed to simplify the deployment and management of containerized applications and databases. It provides a centralized control plane that decouples administrative management from application workloads, allowing users to oversee infrastructure across multiple server nodes through a unified web interface or a command-line tool.

The platform distinguishes itself through an extensive library of pre-configured application templates, enabling the rapid deployment of databases, identity providers, and various productivity or development tools. It sup
- [halilozercan/compose-schedule-calendar](https://awesome-repositories.com/repository/halilozercan-compose-schedule-calendar.md) (243 ⭐) — Demo app for a horizontal schedule(event) calendar
- [github/opensource.guide](https://awesome-repositories.com/repository/github-opensource-guide.md) (15,530 ⭐) — This project serves as a comprehensive repository of best practices and documentation standards for managing open source software. It provides a foundational framework for establishing project governance, defining contributor roles, and structuring the lifecycle of collaborative software development. By centralizing knowledge on community building and operational transparency, it acts as a guide for launching, maintaining, and scaling healthy software projects.

The project distinguishes itself by offering actionable strategies for the human and organizational aspects of software development t
- [open-source-flash/open-source-flash](https://awesome-repositories.com/repository/open-source-flash-open-source-flash.md) (7,320 ⭐) — This project is an open source specification petition platform and proprietary specification archive. It serves as a markdown-based repository for collecting signatures and community support to urge vendors to open source proprietary software specifications.

The platform functions as a tool for open source specification advocacy and proprietary software archival. It creates permanent records of proprietary standards and documents the community efforts required to transition them to open source licenses, ensuring the preservation of technical knowledge.

The system utilizes a git-driven contri
- [awesomedata/awesome-public-datasets](https://awesome-repositories.com/repository/awesomedata-awesome-public-datasets.md) (75,979 ⭐) — This project is a community-maintained, open-access directory of high-quality public datasets. It serves as a centralized reference point for researchers, developers, and data scientists to locate reliable information sources across a wide spectrum of industries and scientific fields. By providing a structured index, the repository facilitates the discovery of data necessary for exploratory analysis, machine learning model training, and the development of data-intensive applications.

The directory distinguishes itself through a lightweight, platform-agnostic approach to resource indexing that
- [swift-open-source/ultratabsaver](https://awesome-repositories.com/repository/swift-open-source-ultratabsaver.md) (290 ⭐) — The open source Tab Manager Extension for Safari.
- [formbricks/formbricks](https://awesome-repositories.com/repository/formbricks-formbricks.md) (12,391 ⭐) — Formbricks is an open-source survey and feedback platform designed to help teams capture and analyze user insights through targeted, in-app, and website-based interactions. It functions as a comprehensive customer experience analytics system that allows organizations to maintain full control over their data, user attributes, and survey workflows.

The platform distinguishes itself through its event-driven architecture, which enables precise behavioral targeting by triggering surveys based on specific user actions or application events. It supports deep integration with external ecosystems by a
- [avengemedia/dankmaterialshell](https://awesome-repositories.com/repository/avengemedia-dankmaterialshell.md) (4,403 ⭐) — DankMaterialShell is a complete Wayland desktop environment that provides a unified set of panels, widgets, system tray, notifications, and an application launcher out of the box. It is built on a plugin-based shell architecture that allows for extending the desktop with custom widgets, launcher items, and background services through a unified component interface. The shell renders its panels, widgets, and overlays using the Wayland layer shell protocol for compositor-agnostic desktop integration.

The project distinguishes itself through several integrated capabilities that work together as a
- [kozea/radicale](https://awesome-repositories.com/repository/kozea-radicale.md) (4,395 ⭐) — Radicale is a self-hosted CalDAV and CardDAV server implemented in Python that enables calendar and contact synchronization across multiple clients using open standards. It stores all data directly on the filesystem in a simple folder hierarchy, eliminating the need for an external database, and automatically tracks every change by committing modifications to a Git repository for version history and backup.

The server distinguishes itself through a modular plugin architecture that allows custom Python modules to extend authentication, storage backends, and web interface functionality at start
- [ellerbrock/open-source-badges](https://awesome-repositories.com/repository/ellerbrock-open-source-badges.md) (548 ⭐) — :octocat: Open Source & Licence Badges
- [balena-io/etcher](https://awesome-repositories.com/repository/balena-io-etcher.md) (33,872 ⭐) — Etcher is a cross-platform utility designed for creating bootable media by flashing raw disk images onto USB drives and SD cards. It functions as a desktop application that provides a graphical interface for low-level storage device management, ensuring data integrity through built-in validation during the writing process.

The application utilizes a unified interface layer to map high-level commands to native system utilities, allowing it to operate consistently across different operating systems. It employs a stream-based data pipeline to pipe image contents directly to storage media, which
- [bitwarden/server](https://awesome-repositories.com/repository/bitwarden-server.md) (18,074 ⭐) — This project provides a comprehensive, self-hosted platform for zero-knowledge credential management and enterprise secrets orchestration. It functions as a secure vault that ensures all encryption and decryption processes occur exclusively on the client side, preventing the server from ever accessing plaintext data. By combining identity federation with robust access controls, the system enables organizations to centralize the management of passwords, passkeys, and sensitive infrastructure credentials.

The platform distinguishes itself through its focus on both human-centric security and aut
- [leantime/leantime](https://awesome-repositories.com/repository/leantime-leantime.md) (9,288 ⭐) — Leantime is an open-source project management platform designed to track tasks, milestones, and workflows using Kanban boards and Gantt charts. It functions as a strategic planning tool that links daily operational tasks to high-level business goals and long-term objectives, while also serving as a time tracking and billing system for managing work hours and client estimations.

The platform differentiates itself through an integrated AI-powered project assistant that decomposes complex tasks, generates status reports, and provides project insights. It further distinguishes its offering with a
- [tapaswenipathak/open-source-programs](https://awesome-repositories.com/repository/tapaswenipathak-open-source-programs.md) (3,856 ⭐) — A list of open source programs.
- [awesome-mlss/awesome-mlss](https://awesome-repositories.com/repository/awesome-mlss-awesome-mlss.md) (3,009 ⭐) — This project is a curated directory and scheduling tool designed for researchers to discover and track global machine learning summer schools and academic programs. It functions as an aggregator that maintains a database of educational opportunities, allowing users to monitor registration windows and event schedules across various research domains.

The platform distinguishes itself through specialized tools for academic deadline management and personal organization. Users can filter programs by topic, geographic location, or registration status, and utilize client-side timezone normalization
- [schedule-x/schedule-x](https://awesome-repositories.com/repository/schedule-x-schedule-x.md) (2,403 ⭐) — JavaScript event calendar. Modern alternative to fullcalendar and react-big-calendar.
- [bitwarden/clients](https://awesome-repositories.com/repository/bitwarden-clients.md) (13,114 ⭐) — This project is a comprehensive zero-knowledge security suite designed for enterprise credential management, secrets orchestration, and password management. It provides a secure, end-to-end encrypted vault that allows users to store, synchronize, and manage sensitive information, including passwords, passkeys, and infrastructure secrets, across desktop, mobile, and browser environments.

The platform distinguishes itself through a strict zero-knowledge architecture where all encryption and decryption occur locally on the client, ensuring that plaintext data remains inaccessible to the server.
- [thealmightybob/calendars](https://awesome-repositories.com/repository/thealmightybob-calendars.md) (101 ⭐) — Cross-platform plugin for querying and modifying device calendars. Supports basic CRUD operations with calendars and events. Try it out with the Calendars Tester.
- [open-source-society/bioinformatics](https://awesome-repositories.com/repository/open-source-society-bioinformatics.md) (6,928 ⭐) — Open Source Society University :microscope: Path to a free self-taught education in Bioinformatics! Archived
- [actualbudget/actual](https://awesome-repositories.com/repository/actualbudget-actual.md) (27,038 ⭐) — Actual is a local-first personal finance manager designed to help users track income, manage expenses, and maintain a balanced budget. It functions as a data-centric application that prioritizes offline access and local file storage, ensuring that financial records remain available and performant regardless of network connectivity.

The platform distinguishes itself through a robust architectural foundation that emphasizes data integrity and auditability. Every financial action is recorded as an immutable sequence of events, and all currency values are processed using an integer-based arithmet
- [endoflife-date/endoflife.date](https://awesome-repositories.com/repository/endoflife-date-endoflife-date.md) (3,153 ⭐) — This project is a product support database and software version metadata registry that tracks release and discontinuation timelines for software and consumer electronics hardware. It provides a programmatic software lifecycle API for retrieving end-of-life and support dates via JSON.

The project maps software products to standardized identifiers, including CPE, Repology, and PURL, to ensure cross-ecosystem identification. It also includes a runtime compatibility mapper that matches software versions to their minimum required compatible runtimes and dependencies.

The system transforms lifecyc
- [arpit456jain/open-source-programs](https://awesome-repositories.com/repository/arpit456jain-open-source-programs.md) (126 ⭐) — I am planning to list some good and beginner friendly open source programs and their timelines
- [forem/forem](https://awesome-repositories.com/repository/forem-forem.md) (22,726 ⭐) — Forem is an open-source platform designed for building and managing technical communities. It functions as a social publishing engine that enables members to share long-form content, participate in threaded discussions, and engage through social interactions. The platform provides tools for organizations to maintain branded profiles, host community hackathons, and facilitate collaborative learning through structured educational tracks.

Beyond its social features, Forem integrates advanced capabilities for AI agent workflow orchestration and codebase knowledge graphing. It allows developers to
- [florinpop17/app-ideas](https://awesome-repositories.com/repository/florinpop17-app-ideas.md) (95,036 ⭐) — App-ideas is a development platform that integrates autonomous AI agents into local environments to orchestrate code review, automated fix application, and workflow management. It functions as a command-line interface that connects external AI assistants to your codebase, enabling iterative development cycles through plugin-based integration and natural language triggers.

The platform distinguishes itself through a robust static analysis engine that traverses syntax trees to enforce structural coding standards and identify violations. Users can define custom review rules, architectural prefer
- [afonsopacifer/open-source-checklist](https://awesome-repositories.com/repository/afonsopacifer-open-source-checklist.md) (215 ⭐) — :octocat: A guide to help you remember important things when creating an open source project ;D
- [super-productivity/super-productivity](https://awesome-repositories.com/repository/super-productivity-super-productivity.md) (17,541 ⭐) — This project is a local-first task manager and time tracking tool designed to consolidate work items from multiple external project management platforms into a single, unified interface. By prioritizing local data sovereignty, it ensures that all task lists, time logs, and application states remain on the user's device, providing full functionality in offline environments while maintaining privacy.

The application distinguishes itself through a focus on deep work and structured productivity rituals. It integrates distraction-free modes, configurable focus timers, and automated time tracking t
- [kanboard/kanboard](https://awesome-repositories.com/repository/kanboard-kanboard.md) (9,663 ⭐) — Kanboard is a self-hosted Kanban project management tool and productivity suite designed for tracking software tasks and team collaboration. It provides a visual system for managing workflows through the use of boards, columns, and cards.

The project features an extensible plugin framework and a comprehensive API for programmatic task and project administration. It includes specialized identity management through LDAP integration, allowing for the synchronization of user accounts and group permissions from directory servers.

The system covers a wide range of capabilities, including event-dri
- [crewaiinc/crewai](https://awesome-repositories.com/repository/crewaiinc-crewai.md) (53,687 ⭐) — CrewAI is a multi-agent orchestration framework designed for building autonomous systems that execute complex, multi-step workflows. It provides a development platform where specialized agents are defined with specific roles, goals, and tool sets to perform tasks collaboratively. By leveraging a declarative workflow engine, the system manages task dependencies, state transitions, and execution logic, allowing for the creation of structured, stateful sequences of operations.

The framework distinguishes itself through its hierarchical management capabilities, which utilize manager agents to coo
- [thomasgalliker/ncrontab.scheduler](https://awesome-repositories.com/repository/thomasgalliker-ncrontab-scheduler.md) (20 ⭐) — NCrontab.Scheduler is a simple, open source task scheduling system that can be used in any .NET application
- [coder/code-server](https://awesome-repositories.com/repository/coder-code-server.md) (78,024 ⭐) — This project provides a remote development platform that enables users to access a full-featured integrated development environment through a standard web browser. By decoupling the user interface from the server-side filesystem, it allows for persistent coding workspaces to be hosted on remote servers, virtual machines, or cloud-native infrastructure, ensuring a consistent development experience from any device.

The platform distinguishes itself through a secure gateway architecture that manages traffic, authentication, and encryption at the edge. It utilizes persistent WebSocket connections
- [cockroachlabs/open-sourced-interview-process](https://awesome-repositories.com/repository/cockroachlabs-open-sourced-interview-process.md) (425 ⭐) — Open Sourced Interview Process
- [punkpeye/awesome-mcp-servers](https://awesome-repositories.com/repository/punkpeye-awesome-mcp-servers.md) (89,264 ⭐) — This project serves as a centralized directory and interoperability hub for the Model Context Protocol, providing a curated collection of standardized service connectors that bridge artificial intelligence models with external software, databases, and APIs. It facilitates the integration of AI agents with diverse ecosystems by offering a registry of machine-readable interface definitions that enable dynamic tool discovery and structured context injection.

The directory distinguishes itself by focusing on the protocol-based interoperability required for autonomous AI agents to interact with he
- [open-source-for-science/tensorflow-course](https://awesome-repositories.com/repository/open-source-for-science-tensorflow-course.md) (16,285 ⭐) — :satellite: Simple and ready-to-use tutorials for TensorFlow
- [pewdiepie-archdaemon/odysseus](https://awesome-repositories.com/repository/pewdiepie-archdaemon-odysseus.md) (72,184 ⭐) — Odysseus is a self-hosted AI workspace and autonomous agent framework designed for deploying and managing large language models. It serves as a centralized platform for orchestrating agentic tasks, utilizing a model context protocol server to connect AI models to external system utilities, browser automation, and local hardware.

The system distinguishes itself through a combination of retrieval-augmented generation and a RAG knowledge base, using vector stores and local embeddings to provide persistent semantic memory. It further integrates AI-driven communication management to triage email i
- [cfpb/open-source-project-template](https://awesome-repositories.com/repository/cfpb-open-source-project-template.md) (214 ⭐) — A project template containing default open source files for new projects
- [twentyhq/twenty](https://awesome-repositories.com/repository/twentyhq-twenty.md) (50,113 ⭐) — Twenty is a headless customer relationship management framework that enables developers to build, version, and deploy custom business applications using code. By utilizing a declarative approach to data modeling, the platform allows for the definition of custom objects, fields, and complex relationships directly within the source code. This schema-driven architecture automatically generates corresponding REST and GraphQL APIs, ensuring that data structures and interface components remain synchronized across development and production environments.

The platform distinguishes itself through a m
- [aws/karpenter-provider-aws](https://awesome-repositories.com/repository/aws-karpenter-provider-aws.md) (7,661 ⭐) — karpenter-provider-aws is a Kubernetes node autoscaler and infrastructure provider for AWS. It serves as a node lifecycle manager and cluster cost optimizer that automatically provisions and removes compute instances based on the resource requirements of pending pods.

The project distinguishes itself through advanced AWS spot instance orchestration and price-capacity optimized selection to reduce cloud spend. It minimizes costs by consolidating underutilized nodes and prioritizing spot or reserved instances over on-demand capacity, while proactively migrating workloads before cloud provider i
- [cachethq/cachet](https://awesome-repositories.com/repository/cachethq-cachet.md) (14,932 ⭐) — Cachet is a self-hosted, open-source status page system designed to communicate service uptime, incident history, and infrastructure performance to end users. It provides a centralized dashboard for managing the operational lifecycle of system components, tracking service disruptions, and scheduling maintenance windows.

The platform distinguishes itself through a comprehensive RESTful API that enables programmatic status page management and automated incident reporting. It supports deep integration with external monitoring tools, allowing for the synchronization of performance metrics and the
- [anthropics/knowledge-work-plugins](https://awesome-repositories.com/repository/anthropics-knowledge-work-plugins.md) (7,583 ⭐) — This project is a plugin framework and agentic workflow library designed to connect large language models to professional toolstacks. It provides a system for integrating language models with external data warehouses, CRMs, and other enterprise software to retrieve and manipulate real-time business data.

The framework enables the automation of specialized professional tasks through a file-based plugin definition system. It allows for the customization of domain expertise and plugin behavior to align with internal company processes, supported by an enterprise data connector that links models t
- [pradumnasaraf/open-source-with-pradumna](https://awesome-repositories.com/repository/pradumnasaraf-open-source-with-pradumna.md) (833 ⭐) — Open Source guide - Contains resources and materials to learn and get yourself started with Open Source, Git, and GitHub.
- [leits/meetingbar](https://awesome-repositories.com/repository/leits-meetingbar.md) (5,122 ⭐) — MeetingBar is a macOS menu bar application that turns your calendar into a one‑click meeting hub. It syncs with your calendar accounts via EventKit, displays your current or next meeting title and countdown directly in the menu bar, and lets you join or create video meetings without opening your calendar app. The app lives as a status‑item popover and can launch automatically at login, register system‑wide keyboard shortcuts, and send local notifications or full‑screen reminders before meetings.

What sets MeetingBar apart is its broad support for over fifty video‑conferencing platforms. It de
- [open-source-legal/opencontracts](https://awesome-repositories.com/repository/open-source-legal-opencontracts.md) (1,356 ⭐) — The open document intelligence platform for builders and hackers - DMS for the agentic world
- [dragonflydb/dragonfly](https://awesome-repositories.com/repository/dragonflydb-dragonfly.md) (30,688 ⭐) — Dragonfly is a high-performance, multi-model in-memory data store designed to serve as a drop-in replacement for existing database infrastructures. By utilizing a multi-threaded, shared-nothing architecture and a fiber-based concurrency model, it maximizes CPU utilization and minimizes latency for read and write operations. The system supports a wide range of data structures, including strings, hashes, lists, sets, sorted sets, and JSON documents, while maintaining full compatibility with standard industry wire protocols and client libraries.

What distinguishes Dragonfly is its focus on effic
- [node-schedule/node-schedule](https://awesome-repositories.com/repository/node-schedule-node-schedule.md) (9,210 ⭐) — node-schedule is a job scheduler for Node.js that executes arbitrary functions based on specific dates or recurring rules. It functions as a date-based and event-driven scheduling system for JavaScript environments, allowing for the automation of one-off events and periodic tasks.

The project supports recurring job scheduling through cron-style strings and recurrence rules, as well as the ability to schedule tasks for precise, single execution dates. It includes timezone-aware date calculations to map recurring rules against global or local time offsets.

The system provides a comprehensive j
- [elastic/elasticsearch](https://awesome-repositories.com/repository/elastic-elasticsearch.md) (77,012 ⭐) — Elasticsearch is a distributed search engine and document store designed for the high-performance indexing and retrieval of massive volumes of unstructured data. It functions as a centralized analytics platform, providing a schema-flexible architecture that organizes information into searchable indices while maintaining global cluster state through a distributed consensus mechanism.

The platform distinguishes itself through its integrated approach to observability, security, and advanced analytics. It combines full-text, vector, and hybrid search capabilities with machine learning-driven insi