# Append-Only Event Store Libraries

> Search results for `append-only event store for event sourcing` on awesome-repositories.com. 118 total matches; showing the first 50.

Explore on the web: https://awesome-repositories.com/q/append-only-event-store-for-event-sourcing

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## Results

- [greenrobot/eventbus](https://awesome-repositories.com/repository/greenrobot-eventbus.md) (24,760 ⭐) — EventBus is a publish-subscribe messaging library designed to facilitate decoupled communication between components in Java applications. It functions as a central hub where producers dispatch events that are routed to subscribers based on the class type of the payload. By using annotation-based markers, the system maps event handlers to specific data types, allowing different parts of an application to exchange information without requiring direct references between classes.

The library distinguishes itself through a focus on performance and execution control. It utilizes a compile-time inde
- [doctrine/event-manager](https://awesome-repositories.com/repository/doctrine-event-manager.md) (6,047 ⭐) — Doctrine Event Manager is a PHP library that implements a publish-subscribe pattern for decoupled application communication. It provides a simple event bus that dispatches named events to registered listeners, enabling components to communicate without direct method calls and promoting loose coupling and extensibility in PHP projects.

The library manages listener callbacks in a central registry keyed by exact event name strings for fast lookup, and invokes listeners in priority sequence for controlled reaction order during event dispatch. It maintains no internal state between dispatches, rel
- [threedotslabs/wild-workouts-go-ddd-example](https://awesome-repositories.com/repository/threedotslabs-wild-workouts-go-ddd-example.md) (6,348 ⭐) — This project is a reference implementation of Domain-Driven Design, Clean Architecture, and Command Query Responsibility Segregation (CQRS) patterns using the Go programming language. It serves as a sample application to demonstrate how to decouple core domain rules from infrastructure and delivery mechanisms.

The system is built as a gRPC microservices architecture, utilizing type-safe communication and service contracts. It implements an event-driven architecture to manage eventual consistency and asynchronous processing, specifically employing the Outbox pattern to ensure reliable messagin
- [ocoda/event-sourcing](https://awesome-repositories.com/repository/ocoda-event-sourcing.md) (265 ⭐) — An event-sourcing library for NestJS
- [cockroachdb/cockroach](https://awesome-repositories.com/repository/cockroachdb-cockroach.md) (32,207 ⭐) — Cockroach is a distributed SQL database designed to scale horizontally across multiple nodes while maintaining strict ACID compliance and global data consistency. It functions as a relational database engine that automatically partitions data into ranges, rebalancing them across a cluster to accommodate growing storage and throughput requirements. By utilizing a distributed consensus protocol, the system ensures that all nodes agree on the order of operations, providing fault tolerance and continuous availability even in the event of hardware failures.

The system distinguishes itself through
- [patchlevel/event-sourcing](https://awesome-repositories.com/repository/patchlevel-event-sourcing.md) (203 ⭐) — An event sourcing library, complete with all the essential features, powered by the reliable Doctrine ecosystem and focused on developer experience.
- [bigskysoftware/htmx](https://awesome-repositories.com/repository/bigskysoftware-htmx.md) (48,210 ⭐) — HTMX is a hypermedia-driven frontend library that enables the creation of dynamic, asynchronous web applications by extending standard HTML attributes. It functions as a declarative engine that intercepts browser events to trigger network requests, allowing developers to update specific regions of the document with server-rendered HTML fragments. By shifting the logic of UI composition to the server, it minimizes the need for complex client-side state management and imperative JavaScript.

The library distinguishes itself through a progressive enhancement workflow that ensures web interfaces r
- [vonng/ddia](https://awesome-repositories.com/repository/vonng-ddia.md) (22,648 ⭐) — This project serves as a comprehensive technical reference for the architecture and design of data-intensive applications. It provides a structured analysis of the fundamental principles required to build reliable, scalable, and maintainable software systems, covering the core trade-offs inherent in modern data infrastructure.

The repository explores the mechanics of distributed data management, including strategies for replication, partitioning, and achieving consensus across multiple nodes. It details the design of storage engines, indexing techniques, and transaction management models, whi
- [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
- [temporalio/temporal](https://awesome-repositories.com/repository/temporalio-temporal.md) (18,411 ⭐) — Temporal is a distributed workflow orchestration engine designed to manage fault-tolerant, stateful, and long-running background processes. It functions as a platform for coordinating complex cross-service operations, ensuring consistency and reliability in distributed environments by decoupling workflow orchestration from task execution.

The platform distinguishes itself through a deterministic, event-sourced execution model that reconstructs workflow state by re-executing code from an immutable event log. This approach isolates non-deterministic side effects into managed activities, allowin
- [andreschaffer/event-sourcing-cqrs-examples](https://awesome-repositories.com/repository/andreschaffer-event-sourcing-cqrs-examples.md) (596 ⭐) — Event Sourcing and CQRS in practice.
- [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
- [arrow-kt/arrow](https://awesome-repositories.com/repository/arrow-kt-arrow.md) (6,558 ⭐) — Arrow is a functional programming library for Kotlin that provides tools for implementing data-oriented programming patterns. It serves as a framework for typed error handling, a concurrency toolkit, and a library for the manipulation of immutable data.

The project distinguishes itself through specialized capabilities for managing application failures using explicit types instead of exceptions and implementing resilience patterns such as circuit breakers and retry policies for distributed services. It also provides optics to update and query deeply nested immutable data structures without man
- [prooph/event-store](https://awesome-repositories.com/repository/prooph-event-store.md) (547 ⭐) — PHP 7.4 EventStore Implementation
- [emqx/emqx](https://awesome-repositories.com/repository/emqx-emqx.md) (16,422 ⭐) — This project is a high-performance MQTT broker and IoT data platform designed to manage millions of concurrent device connections. It provides a scalable infrastructure for ingesting, processing, and routing telemetry data across distributed systems, utilizing an actor-based concurrency model to maintain high availability and state synchronization across cluster nodes.

The platform distinguishes itself through integrated stream processing and edge computing capabilities. It allows users to execute declarative SQL-based rules directly against incoming message streams for real-time filtering, t
- [thephpleague/event](https://awesome-repositories.com/repository/thephpleague-event.md) (1,566 ⭐) — Event package for your app and domain
- [eduardopires/equinoxproject](https://awesome-repositories.com/repository/eduardopires-equinoxproject.md) (6,774 ⭐) — EquinoxProject is an ASP.NET 9 web application template and reference implementation for building enterprise software. It provides a structural boilerplate centered on clean architecture, domain-driven design, and the separation of read and write operations through a command query responsibility segregation framework.

The project incorporates event sourcing to track the history of business entities as a sequence of events for auditing and state reconstruction. It utilizes a layered approach to decouple business logic from external dependencies and frameworks.

The system includes capabilities
- [cakephp/event](https://awesome-repositories.com/repository/cakephp-event.md) (22 ⭐) — [READ-ONLY] The event dispatcher library for CakePHP. This repo is a split of the main code that can be found in https://github.com/cakephp/cakephp
- [clickhouse/clickhouse](https://awesome-repositories.com/repository/clickhouse-clickhouse.md) (48,229 ⭐) — ClickHouse is a high-performance, columnar analytical database designed for real-time query execution and large-scale data aggregation. It functions as a distributed data warehouse capable of processing petabytes of information, while also providing an embedded engine that integrates directly into applications for native query capabilities without external dependencies. The system is built to handle high-throughput ingestion and complex analytical workloads, delivering millisecond-level latency for interactive dashboards and operational monitoring.

The platform distinguishes itself through ad
- [akkadotnet/akka.net](https://awesome-repositories.com/repository/akkadotnet-akka-net.md) (5,023 ⭐) — Akka.NET is an actor model framework used for building concurrent and distributed applications. It functions as a distributed computing platform and state manager that enables isolated actors to communicate via asynchronous message passing, ensuring thread-safe state management without manual locks.

The project is distinguished by its decentralized coordination capabilities, including a distributed state manager that uses sharding and dynamic rebalancing to maintain high availability. It incorporates an event sourcing engine that persists state as a sequence of events in an append-only log an
- [vuejs/events](https://awesome-repositories.com/repository/vuejs-events.md) (0 ⭐) — This repo contains the site for Vue.js Events in an effort to centralize all Vue.js community efforts (e.g., meetups, conferences and workshops).
- [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
- [clockworklabs/spacetimedb](https://awesome-repositories.com/repository/clockworklabs-spacetimedb.md) (19,189 ⭐) — SpacetimeDB is a stateful, real-time database platform that executes application logic directly within the database engine. By unifying data storage and business logic, it allows developers to build applications where state transitions are processed through atomic, server-side functions. The platform maintains persistent connections to stream incremental updates to clients, ensuring that local caches remain synchronized with the server state at all times.

The platform distinguishes itself by generating type-safe client interfaces directly from server-side schema definitions, ensuring consiste
- [fastapi/fastapi](https://awesome-repositories.com/repository/fastapi-fastapi.md) (99,260 ⭐) — FastAPI is a web framework for building APIs with Python. It leverages standard language type hints to provide automatic data validation, request parsing, and interactive API documentation generation. The framework supports asynchronous request handling and manages execution contexts to prevent blocking the main event loop.

The project includes a dependency injection system that allows for the resolution and injection of reusable components into request handlers. This system supports request-scoped caching, lifecycle management, and integration with security mechanisms like OAuth2 and JSON We
- [doocs/advanced-java](https://awesome-repositories.com/repository/doocs-advanced-java.md) (78,987 ⭐) — This project is a comprehensive Java backend engineering guide and technical reference focused on high-concurrency design, distributed systems, and microservices architecture. It provides detailed strategies for decomposing monolithic applications, managing service discovery, and implementing the architectural patterns required for scalable backend environments.

The repository distinguishes itself through an extensive collection of big data algorithmic references and database scaling strategies. It covers memory-efficient techniques for analyzing massive datasets, such as Top-K element extrac
- [juicycleff/nestjs-event-store](https://awesome-repositories.com/repository/juicycleff-nestjs-event-store.md) (203 ⭐) — NestJS CQRS module for EventStore.org. It requires @nestjs/cqrs
- [zitadel/zitadel](https://awesome-repositories.com/repository/zitadel-zitadel.md) (13,029 ⭐) — This project is a cloud-native identity and access management platform designed to centralize authentication, authorization, and identity lifecycle management. It functions as a standards-compliant OpenID Connect authorization server, providing secure session management and token issuance for web, mobile, and device-based applications. The platform is built to handle complex identity requirements through stateless token authentication and support for modern passwordless methods, including biometrics and hardware keys.

What distinguishes this platform is its native support for multi-tenant env
- [evgeniy-khist/ksqldb-event-souring](https://awesome-repositories.com/repository/evgeniy-khist-ksqldb-event-souring.md) (0 ⭐) — Introduction Example Domain Event Sourcing and CQRS 101 State-Oriented Persistence Event Sourcing CQRS Advantages of CQRS Advantages of Event Sourcing Requirements for Event Store Solution Architecture Kafka Topic Architecture ksqlDB Streams vs Tables ksqlDb Event Store Naive Solution (Not…
- [datahub-project/datahub](https://awesome-repositories.com/repository/datahub-project-datahub.md) (12,141 ⭐) — DataHub is a metadata management platform designed to unify technical, operational, and business context across diverse data ecosystems. By utilizing a graph-based metadata model and an event-driven ingestion architecture, it creates a centralized source of truth that maps complex data relationships, lineage, and ownership. This foundational framework enables organizations to maintain a synchronized view of their data landscape, supporting both human-led discovery and automated data operations.

The platform distinguishes itself through its focus on grounding artificial intelligence and autono
- [threedotslabs/watermill](https://awesome-repositories.com/repository/threedotslabs-watermill.md) (9,760 ⭐) — Watermill is a Go library for building event-driven applications. It provides a framework for implementing event-driven architectures through a consistent interface for message publishing and subscribing, featuring a pub/sub message router and event stream processing pipelines.

The library uses interface-based abstractions to decouple message producers and consumers from the underlying message broker. This allows different messaging technologies to be swapped via plugin-based broker integration. It employs a router-driven dispatch system and middleware-based pipelines to manage cross-cutting
- [nicktsitlakidis/event-nest](https://awesome-repositories.com/repository/nicktsitlakidis-event-nest.md) (30 ⭐) — A collection of NestJs libraries to help you build applications based on event sourcing.
- [diem/diem](https://awesome-repositories.com/repository/diem-diem.md) (16,678 ⭐) — Diem is a distributed ledger technology platform designed for the development of decentralized applications and the execution of programmable financial transactions. It provides a comprehensive framework for operating validator nodes that maintain ledger integrity through a Byzantine fault-tolerant consensus protocol, ensuring consistent state updates across a distributed network of participants.

The platform distinguishes itself through a modular node architecture that decouples consensus, execution, and storage to facilitate scalability and maintenance. It utilizes a resource-oriented virtu
- [lichess-org/lila](https://awesome-repositories.com/repository/lichess-org-lila.md) (18,362 ⭐) — Lila is a comprehensive, open-source chess gaming platform designed for real-time multiplayer interaction, competitive tournament management, and deep strategic analysis. It provides a global environment where users can engage in live matches, participate in structured competitions, and access extensive archives of historical game data for research and study.

The platform distinguishes itself through a highly scalable architecture that utilizes actor-model concurrency and event-sourced game states to ensure precise match reconstruction and fault tolerance. It integrates distributed engine eva
- [avaloniaui/avalonia](https://awesome-repositories.com/repository/avaloniaui-avalonia.md) (30,986 ⭐) — Avalonia is a cross-platform desktop framework that enables the creation of native-feeling applications for Windows, macOS, and Linux from a single codebase. It functions as a declarative UI toolkit, allowing developers to define complex visual hierarchies and interface structures using a markup-based syntax that maps directly to underlying object properties. By utilizing the Model-View-ViewModel architectural pattern, the framework facilitates a clean separation between application logic and user interface layout, which simplifies unit testing and component maintenance.

The framework disting
- [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
- [yak0/nest-event](https://awesome-repositories.com/repository/yak0-nest-event.md) (148 ⭐) — Event handling with decorators for NestJS Framework
- [akka/akka](https://awesome-repositories.com/repository/akka-akka.md) (13,271 ⭐) — Akka is an actor model framework and distributed systems platform used to build concurrent and distributed applications. It provides a toolkit for managing multi-threaded state and behavior through asynchronous message passing, allowing developers to create concurrent applications without manual locks or synchronization.

The system functions as a cluster management and event sourcing framework, automating the scaling and coordination of high-availability clusters. It enables the deployment of elastic services that coordinate workloads across multiple network nodes and ensures fault tolerance
- [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.
- [symfony/event-dispatcher](https://awesome-repositories.com/repository/symfony-event-dispatcher.md) (8,541 ⭐) — Symfony Event Dispatcher is a library that implements the observer pattern, enabling event-driven communication between application components. It provides a central dispatch mechanism where components can broadcast named events and register listeners to react to them, decoupling event producers from consumers.

The library supports any PHP callable as an event listener and organizes listeners in a priority-ordered queue for controlled execution. Listeners can stop event propagation to prevent subsequent handlers from running, and the subscriber-based registration system allows grouping multip
- [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
- [google-research/google-research](https://awesome-repositories.com/repository/google-research-google-research.md) (38,139 ⭐) — This repository serves as a comprehensive research platform and toolkit for advancing machine learning, quantum computing, and large-scale scientific data analysis. It provides foundational frameworks for developing complex algorithmic systems, offering the necessary infrastructure for distributed training, computational graph execution, and high-performance model development.

The project distinguishes itself by integrating specialized research domains with robust, privacy-preserving methodologies. It supports diverse scientific discovery through tools for quantum simulation, physics-informed
- [nestjs/event-emitter](https://awesome-repositories.com/repository/nestjs-event-emitter.md) (245 ⭐) — Event Emitter module for Nest framework (node.js) 🦋
- [pingdotgg/t3code](https://awesome-repositories.com/repository/pingdotgg-t3code.md) (12,671 ⭐) — t3code is a platform for operating AI coding agents through a web interface to develop and maintain software projects. It functions as an orchestrator that manages AI agent lifecycles and communication, providing a system for provisioning isolated remote development environments and managing secure connections to cloud-hosted resources.

The project utilizes an event-sourced backend architecture that processes typed commands into persisted domain events to maintain system state. It employs a communication system based on JSON-RPC over WebSockets to synchronize real-time state and events betwee
- [omnivore-app/omnivore](https://awesome-repositories.com/repository/omnivore-app-omnivore.md) (15,882 ⭐) — Omnivore is an open-source, self-hostable read-it-later application designed to centralize web articles, newsletters, and digital documents into a personal library. It functions as a comprehensive content archiver that captures web pages and stores them locally, ensuring permanent access and readability regardless of internet connectivity.

The platform distinguishes itself through an event-sourced synchronization engine that maintains a consistent state across multiple devices by replaying user actions. It utilizes a headless web scraping service to extract clean text and metadata from raw we
- [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
- [melvinkcx/fastapi-events](https://awesome-repositories.com/repository/melvinkcx-fastapi-events.md) (608 ⭐) — Asynchronous event dispatching/handling library for FastAPI and Starlette
- [orthecreedence/event-glue](https://awesome-repositories.com/repository/orthecreedence-event-glue.md) (21 ⭐) — A compact, extendable eventing fabric.
- [livestorejs/livestore](https://awesome-repositories.com/repository/livestorejs-livestore.md) (3,475 ⭐) — Livestore is a reactive state management framework that utilizes a local SQLite database to store and synchronize application data. It provides an event-sourced state store that processes typed events through materializer functions to derive and persist application state.

The framework implements offline-first data synchronization using a push-pull engine and append-only event logs to maintain consistency between clients and servers. It includes a real-time presence system for tracking user activity and shared session status across connected clients.

The system covers a broad capability surf
- [sindresorhus/p-event](https://awesome-repositories.com/repository/sindresorhus-p-event.md) (450 ⭐) — Promisify an event by waiting for it to be emitted
- [kurrent-io/kurrentdb](https://awesome-repositories.com/repository/kurrent-io-kurrentdb.md) (5,809 ⭐) — KurrentDB is an event-native database designed for event sourcing and event-driven architectures. It stores events as immutable, ordered records in streams, preserving a complete audit trail and enabling temporal queries. The database uses gRPC for all client-server and inter-node communication, providing efficient binary serialization and bidirectional streaming, and supports atomic multi-stream writes that ensure consistency across multiple streams in a single transaction.

The database distinguishes itself with a built-in JavaScript projection engine that transforms, filters, and aggregates