Open-source alternatives to Spacebarchat

Mumble is a low-latency voice over IP system designed for real-time communication. It provides a self-hosted, encrypted voice server that secures data transmission using public-private key authentication and digital certificates. The platform distinguishes itself through a request-response protocol for remote configuration and integration with external automation scripts. It also features a graphical overlay that renders active speaker information and chat status on top of other running applications, as well as positional audio to simulate the 3D spatial location of speakers in a virtual envi

Lets-chat is a self-hosted team communication platform and XMPP chat server designed for private messaging. It provides a containerized communication environment for small teams to exchange messages and files, featuring a programmable REST API for automating conversations and managing messages from external tools. The platform functions as an XMPP gateway and server, ensuring interoperability with other compliant messaging clients. It distinguishes itself by supporting enterprise identity management, allowing administrators to verify user identities through local accounts or external director

Once Campfire is a self-hosted team chat platform and real-time messaging server. It provides a web-based communication environment for internal team messaging, featuring group channels, private direct messages, and a bot-integrated system for automating external messaging services. The platform is distributed as a dockerized collaboration suite, allowing for containerized deployment with bundled application dependencies and automated SSL provisioning. The system covers a broad range of collaboration capabilities, including chat management with granular access controls, file attachment shari

apprtc is a WebRTC video chat application and signaling server designed to establish peer-to-peer audio and video communication between browsers. It provides a coordination layer using a websocket-based signaling server to exchange session descriptions and network candidates. The project is delivered as a dockerized communication app, allowing for a containerized deployment of the calling service for local development or cloud hosting. It includes a network gateway that integrates STUN and TURN servers to facilitate media flow through firewalls and NATs. The implementation covers peer discov

This project is a browser-based video conferencing platform that facilitates direct, peer-to-peer communication between participants. By utilizing browser-native media capture and direct network connections, it enables real-time audio, video, and screen sharing without relying on central media relay servers. The platform distinguishes itself through its focus on ephemeral, private communication. It generates unique, short-lived session identifiers for virtual rooms that exist only in memory, ensuring that no persistent user accounts or long-term storage are required. To maintain connection st

WildfireChat’s im-server is an open-source instant messaging backend that handles message routing, user management, and group chat for private deployments. It provides a self-hosted messaging platform that can run on private infrastructure without third-party cloud dependencies, supporting enterprise messaging with group management, user directories, and external system integration. The server synchronizes messages and state across mobile, desktop, web, and mini-program clients simultaneously, and supports real-time audio/video calls with group conferencing and live streaming. It includes enc

simple-peer is a JavaScript library that provides a wrapper for WebRTC to simplify the establishment of peer-to-peer networking in the browser. It serves as a tool for creating direct device-to-device connections for the transmission of binary data and real-time media streaming. The library manages the exchange of strings and binary buffers through a data channel implementation and provides tools for sharing real-time audio and video tracks between peers. It covers the full lifecycle of peer connectivity, including signaling coordination, session description negotiation, and the gathering of

This project is a Rack middleware rate limiter and application layer firewall for Ruby web applications. It serves as a security layer to throttle and block HTTP requests based on custom rules, protecting web servers from abusive traffic. The system provides capabilities for IP blocking and the banning of malicious clients. It implements request safelisting to bypass restrictions for trusted users and uses time-windowed rate limiting to control request frequency. The middleware covers traffic management and monitoring, including the ability to track request patterns and instrument traffic ev

SafeLine is a containerized web application firewall and reverse proxy designed to secure web services by inspecting incoming HTTP traffic. It acts as a security gateway that sits in front of backend infrastructure to filter malicious requests and enforce access policies before they reach the application server. The platform distinguishes itself through advanced bot mitigation and content protection capabilities. It employs challenge-response mechanisms to verify human users and dynamically obfuscates HTML and JavaScript content to prevent unauthorized scraping and code tampering. These featu

Higress is an AI API gateway and cloud-native traffic manager that functions as a Kubernetes ingress controller. It provides a centralized system for routing, securing, and optimizing traffic directed toward large language models, AI agents, and microservice architectures. The project distinguishes itself through deep AI orchestration, including the ability to host and manage Model Context Protocol servers that transform REST APIs into tools for AI agents. It features specialized AI infrastructure for model request proxying, protocol translation across multiple providers, and semantic-based c

This project is a Node.js HTTP proxy server that enables cross-domain API requests from browsers by injecting Cross-Origin Resource Sharing headers into HTTP responses. It functions as a reverse proxy gateway and header manipulator, allowing for the interception and modification of traffic between a client and a target server. The proxy provides mechanisms to bypass browser same-origin policy restrictions through automated header injection. It includes capabilities for origin-based rate limiting and request interception to control traffic flow and prevent unauthorized usage of the proxy servi

BibiGPT v1 · one-Click AI Summary for Audio/Video & Chat with Learning Content: Bilibili | YouTube | Tweet丨TikTok丨Dropbox丨Google Drive丨Local files | Websites丨Podcasts | Meetings | Lectures, etc. 音视频内容 AI 一键总结 & 对话：哔哩哔哩丨YouTube丨推特丨小红书丨抖音丨快手丨百度网盘丨阿里云盘丨网页丨播客丨会议丨本地文件等 (原 BiliGPT 省流神器 & AI课代表)

Mattermost Server is an open source collaboration suite and self-hosted team communication platform. It functions as an enterprise chat server and extensible messaging backend that provides a secure environment for professional organizations to exchange messages and coordinate software development. The platform is designed as an AI-integrated communication hub, embedding artificial intelligence into messaging flows to assist users with information retrieval and task completion. It supports a high degree of customization through a plugin-based extension model, allowing for the creation of cust

Bunkerized Nginx is a containerized security automation system that provides a secure reverse proxy and web application firewall. It focuses on protecting web applications by monitoring container labels within cloud-native orchestration systems to automatically update security settings and firewall rules. The system distinguishes itself through automated security operations, including the automatic management of SSL certificates and an automated client banning mechanism that blocks IP addresses based on HTTP status codes. It features bot challenge mechanisms using CAPTCHAs, JavaScript, or coo

SFTPGo is a multi-protocol file server and secure file transfer gateway that enables the exchange and storage of files via SFTP, FTP, HTTP, and WebDAV. It provides a unified management interface and a web-based file manager for configuring server settings, user permissions, and collaborating on documents. The project functions as a cloud storage gateway, bridging legacy file transfer protocols to modern backends such as S3, Google Cloud Storage, and Azure Blob. It features an automated data workflow engine that uses dynamic logic and virtual folders to route files and manage data lifecycles a

Higress is an AI-native and cloud-native API gateway that routes, secures, and optimizes traffic between clients and large language model services. It functions as a centralized entry point for microservices, serving as both a Kubernetes ingress controller and an AI gateway orchestrator. The project distinguishes itself by managing traffic across multiple AI providers using a unified protocol, incorporating token-aware rate limiting and response caching to optimize model inference. It coordinates communication between AI models and external tools to provide real-time context and data, while a

Decky Loader is an open-source plugin system that extends the Steam Deck's gaming mode interface with community-made plugins and customizations. It functions as a plugin loader that injects JavaScript plugins into the Steam Deck's web-based interface at runtime, enabling real-time appearance and behavior changes without leaving the active gaming session. The system combines a CORS-bypassing proxy layer that intercepts and modifies HTTP fetch requests from plugins to remove same-origin restrictions, with a Python-to-TypeScript bridge that exposes Python functions as callable TypeScript methods

CKAN is an open-source data management platform that provides the foundation for building data portals. It supports the full lifecycle of datasets—from creation and organization to publishing, cataloging with faceted search, and interactive data visualization—all through a web interface. The platform is built on a modular architecture that includes a plugin-based extensibility system, a harvesting framework for importing metadata from external sources, and a standardized RESTful JSON API for programmatic access to datasets and metadata. The web interface is rendered using the Jinja2 templatin

This project is a self-hosted AI frontend and web-based chat interface designed to interact with large language model APIs. It functions as an API-based chat client and dashboard that enables users to send prompts and receive responses from generative AI models. The application serves as a self-hosted AI gateway, providing API key proxying to connect official model keys to a web interface. It includes security and traffic controls, such as interface access restrictions via a shared secret key and request volume limiting to prevent service abuse. The system covers conversation data management

Octelium is a zero-trust network access platform and identity-aware proxy designed to secure private HTTP, SSH, and SQL resources. It functions as a secure gateway that validates human and workload identities using OIDC, SAML, and FIDO2 passkeys before granting access to internal applications and SaaS APIs. The system is distinguished by its secretless access broker, which injects credentials—such as API keys, passwords, and AWS Sigv4 signatures—at the gateway level so users can access databases and cloud resources without managing secrets. It further specializes in AI gateway administration,

This project is a comprehensive reference collection of practical implementation examples and patterns for building applications with Spring Boot. It serves as a Java web application template and a showcase for developing functional web services featuring REST endpoints, template engines, and global exception handling. The repository distinguishes itself by providing detailed demonstrations of enterprise-grade features, including distributed locking, task scheduling, and asynchronous message exchange using brokers like RabbitMQ. It also includes reference implementations for automated API doc

HuLa is an open-source communication suite and cross-platform chat client designed for real-time instant messaging, voice, and video calls. It functions as an LLM-integrated messaging platform and an AI-powered social manager that synchronizes user data and settings across different operating systems. The platform integrates large language models to provide automated AI assistants, real-time message translation, and chat log summarization. It further utilizes artificial intelligence for user sentiment analysis to assist with social matching and risk management. The system includes a high-per

SD.Next is an all-in-one web interface and multi-backend inference engine for generating, editing, and processing images and videos using diffusion models. It functions as a comprehensive tool for diffusion model management and an automated image processing pipeline for bulk operations. The project is distinguished by its hardware-backend abstraction layer, which provides automatic detection and acceleration for NVIDIA CUDA, AMD ROCm, Intel OpenVINO, and DirectML. It features a headless generative API and a programmatic command interface, allowing users to trigger tasks via REST API or CLI wi

Redis is a high-performance in-memory key-value store that functions as a distributed cache, message broker, and NoSQL database. It provides sub-millisecond read and write access to data stored in RAM and can operate as a vector database for indexing high-dimensional embeddings. The system supports a wide range of data storage and synchronization primitives, including the management of strings, hashes, lists, sets, and JSON documents. It enables real-time data operations through atomic transactions, hybrid persistence using snapshots and append-only logs, and high-availability configurations

webpack-dashboard is a terminal-based build monitor and asset viewer designed for the Webpack development process. It provides a command line interface to track compilation status, monitor development server activity, and organize build errors for debugging. The tool integrates as a Webpack plugin to intercept compilation events and extract asset metadata. It utilizes a terminal-UI layout engine and state-driven rendering to display build progress and logs in a structured grid of dynamic windows. The system includes capabilities for real-time build log visualization and asset filtering using

DbGate is a universal database management tool and SQL client that provides a unified interface for querying and administering multiple SQL and NoSQL databases. It functions as a multi-database administration GUI and SQL IDE, allowing users to write and execute scripts and manage database schemas. The project distinguishes itself by acting as an API client and explorer for REST, GraphQL, and OData services, enabling users to fetch and export data from these endpoints. It also serves as a data integration tool, facilitating the movement of records between diverse databases and file formats suc

2FAuth is a self-hosted two-factor authentication server and credential vault. It functions as a web-based authenticator app used to organize and generate time-based one-time passwords and other security codes for multiple accounts in a central location. The system distinguishes itself as an API-driven security manager, allowing authentication codes to be integrated into automated workflows and external applications. It also supports shared security credentialing through the use of isolated vaults and shared folders for team collaboration. The project covers a broad range of security and dat