Reactive Extensions GitHub Repositories (2026) · Open Source Tools

🏎️ Streams & Reactive Programming paradigm for Go: declarative and composable API for event-driven applications

An Intuitive Event-Driven Reactive Programming Library for Java

Non-Blocking Reactive Foundation for the JVM

ReactiveX for Python

Reactive collections based on Rx.Net

An observable microservice bus library for .NET, that wraps the underlying message transports in simple Rx based interfaces.

A composable, cross-platform MVVM framework for .NET inspired by functional reactive programming. It moves mutable state out of the user interface, keeps each feature's logic in one readable place, and makes applications easier to test. Supports WPF, WinForms, WinUI, .NET MAUI, Avalonia, Uno Platform, Blazor and Android.