Find the best open-source alternatives

A high-performance, AI-native software-defined PBX built in Rust for programmable contact centers.

A turn-based strategy game where players control teams of hedgehogs using over 40 weapons to battle on destructible terrain.

An all-language AI-powered code completion backend that provides intelligent autocompletions across multiple editors.

A modern, open-source, on-premise CI/CD system focused on testing and scalability.

A portable mixed-precision math library with 2,000+ SIMD kernels for 15+ numeric types across x86, Arm, RISC-V, and WebAssembly.

An open-source, cross-platform game development environment based on Game Maker, compiling EDL/GML to C++ for performance.

A modern open-source interpreter for Commander Keen and Cosmo's Cosmic Adventure games, enhancing classic DOS gameplay with new features.

A fast and simple Node.js version manager built in Rust, supporting cross-platform development.

A lightweight, self-hosted alternative to Firefox Send for private file sharing with automatic expiration and S3 support.

A decentralized hyperparameter optimization framework for Go, inspired by Optuna, supporting Bayesian optimization and evolution strategies.

A Swift framework for building iOS UI components like Lego bricks, making UI development declarative, configurable, and reusable.

A versatile Rust tool for generating and mutating wordlists using patterns, web scraping, and password formats.

A lightweight alternative to the official Firebase Firestore SDK for the browser, optimized for bundle size and performance.

A scalable, language-agnostic real-time messaging server for building chat apps, live features, and collaborative tools.

A Core XY plotter designed as a second machine combining AxiDraw's pen flexibility with Roland's speed and size.

A Groovy library for Android providing view injection, threading, and state persistence through annotations.

Open-source data integration platform for building ELT pipelines from APIs, databases, and files to data warehouses, lakes, and lakehouses.

A lightweight, zero-dependency currency conversion library for JavaScript and TypeScript, designed as a modern successor to money.js.

A JAX-based framework for training large language models with a focus on legibility, scalability, and reproducibility.

A platform to programmatically author, schedule, and monitor workflows as code.

A web service to collect and inspect arbitrary HTTP requests via RESTful API or web UI, useful for testing webhooks and REST clients.

An open-source, self-hosted emailing platform for sending newsletters and transactional emails with enterprise-grade features.

A cloud-native Identity Aware Proxy and Access Control Decision service for authenticating, authorizing, and transforming HTTP requests.

A simple, dependency-free job queue plugin for CakePHP enabling deferred task execution.

A Common Lisp development environment for Vim and Neovim with REPL integration, debugging, and IDE-like features.

Lima launches Linux virtual machines with automatic file sharing and port forwarding, focusing on running containers on macOS and other hosts.

A Neovim plugin that displays LSP hover documentation in a resizable side panel for better code reference.

A hackable open-source voice assistant platform for building and running custom voice-controlled applications.

A Python ETL framework for stream processing, real-time analytics, and building live LLM/RAG pipelines, powered by a scalable Rust engine.

An open-source map tool for real-time collaborative exploration and annotation.

An interactive terminal client for Redis with auto-completion, syntax highlighting, and safety features for production use.

A self-hosted media tracker for movies, TV shows, anime, manga, video games, books, comics, and board games.

An open-source HTML5 video player with Flash fallback for web developers.

A small, fast Canvas 2D-based charting library for time series, lines, areas, ohlc, and bars.

The admin interface for Ghost, a modern open-source publishing platform.

A library that enables Behavior-Driven Development (BDD) testing by converting Gherkin feature files into Playwright test files.