Parallelism GitHub Repositories (2026) · Open Source Tools

oneAPI Threading Building Blocks (oneTBB)

The C++ Standard Library for Parallelism and Concurrency

Kalandra is a functional, parallel, distributed programming language.

Parallel Collectors is a toolkit easing parallel collection processing in Java using Stream API.

Pax is a Jax-based machine learning framework for training large scale models. Pax allows for advanced and fully configurable experimentation and parallelization, and has demonstrated industry leading model flop utilization rates.

Fast and small Node.js worker_threads and cluster worker pool

A high-performance Ractor web server for Ruby 4.0+: Rack 3-based, with a Rust Tokio/Hyper front-end and Ractor-parallel Ruby workers and threaded fallback mode.

Lsglang is a special extension of sglang that fully utilizes CPU and GPU computing resources with an efficient GPU parallel + NUMA parallel architecture, suitable for MOE model hybrid inference.

Knapsack Pro gem splits tests across parallel CI nodes and makes sure that tests run in optimal time

Tools for concurrent programming in Rust