Best Open Source Libraries & SDKs Tools

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

Promise-based HTTP client

Create PDF files using React

Human-friendly HTTP request library for Node.js

Tiny elegant HTTP client based on Fetch

Drools is a rule engine, DMN engine and complex event processing (CEP) engine for Java

Rust friendly bindings to *nix APIs

Persistent HTTP cache for python requests

Tools to convert SQLAlchemy models to Pydantic models

Full featured redis cache backend for Django.

Multi-format archive and compression library