#distributed-systems

:traffic_light: Traffic control for code.

Python Stream Processing. A Faust fork

:rocket: Progressive microservices framework for Node.js

Agentic QE Fleet is an open-source AI-powered QA/QE platform designed for use with Coding Agents (works best with Claude Code) featuring specialized agents and skills to support testing activities for a product at any stage of the SDLC. Free to use, fork, build, and contribute. Based on the Agentic QE Framework created by Dragan Spiridonov.

A Multi-Raft implementation for Erlang and Elixir that strives to be efficient and make it easier to use multiple Raft clusters in a single system.

For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.

Rucio - Scientific Data Management

Universal HTAP Engine

Pluggable foundation blocks for building distributed apps.

Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

A pure-Go, production-grade implementation of Yjs. Runs real collaborative apps: a horizontally-scaling, Hocuspocus-compatible websocket server with versioned persistence and compaction. Hardened by differential fuzzing and a byte-level conformance suite. Also embeddable on iOS/Android via gomobile.

Raft library for maintaining a replicated state machine

Tango provides a way to compute the changed targets for a given base and head and conflict graph. Uber's SubmitQueue relies on it to get changed targets to speculate the requests.

Dkron - Distributed, fault tolerant job scheduling system https://dkron.io

Golem Cloud is the agent-native platform for building AI agents and distributed applications that never lose state, never duplicate work, and never require you to build infrastructure.

Distributed High-Performance Symbolic Regression in Julia

Backend-agnostic caching for Python — intent-based decorators with circuit breaker, distributed locking, Prometheus metrics, and optional zero-knowledge AES-256-GCM encryption, on a Rust-powered core. Zero-config L1 in-memory; scales to Redis, Memcached, File, or CacheKit Cloud.

Kubernetes operator for YTsaurus.

Library for bringing distributed capabilities to Apache DataFusion

Grelmicro is a lightweight framework/toolkit which is ideal for building async microservices in Python.

(S)AGE - (Sovereign) Agent Governed Experience

Transactional Outbox for reliable event delivery with Spring Boot

An async messaging framework for Rust

A library for event sourcing in Python.

Unified resilience patterns for Python — retry, circuit breaker, timeout, fallback, bulkhead, rate limiter, and cache in one decorator. Python's Resilience4j.

raxol.io - one Elixir module, every surface. The terminal for your Gundam.

[Go]Minimal event sourcing/CQRS library using protocol buffers for commands, events and states.

Apache ZooKeeper