Find the best open-source alternatives

A JavaScript-native Ethereum Virtual Machine that runs in browsers, Node.js, Bun, and Deno for instant contract simulation and testing.

A high-level Ruby API for controlling Chrome/Chromium via the Chrome DevTools Protocol without Selenium dependencies.

A reactive Python notebook that's reproducible, git-friendly, and deployable as scripts or apps.

A free, privacy-respecting, self-hostable pictionary game with no ads or accounts required.

Open source platform for creating, filling, and signing digital documents with an easy-to-use, mobile-optimized web tool.

JavaScript integration packages for Tolgee, an open-source localization platform with in-context translation.

An open-source, self-hosted ML experiment tracker with a performant UI and SDK for comparing and querying training runs.

An open-source platform for AI-driven software development, offering an SDK, CLI, GUI, and cloud service for building and running software agents.

A stripped-down, bare-bones authentication library for Ruby on Rails applications.

UI components library for building search interfaces with Elasticsearch, OpenSearch, Solr, and MongoDB for React and Vue.

An open-source visual regression testing tool for Storybook, Ladle, Histoire, and modern frontend applications.

An interactive GNU/Linux application firewall that monitors and controls outbound network connections.

A web debugging proxy that captures and analyzes network traffic using the Chrome DevTools interface.

A fast and simple OCR library written in Swift, optimized for recognizing short alphanumeric codes like gift cards.

A PostgreSQL-compatible, cloud-native distributed SQL database for mission-critical applications requiring scalability and high availability.

A simple, fast, and declarative JSON serialization library for Ruby objects, designed as a Rails serializer alternative.

An open-source AI memory tool that captures your screen and audio locally, enabling search and automation agents based on your computer activity.

An open-source, horizontally scalable binary artifact management tool supporting Maven, Docker, npm, and more.

Open-source video conferencing platform with HD quality, content sharing, and end-to-end encryption for self-hosted or embedded meetings.

A fast, local-first, reactive NoSQL database for JavaScript applications with realtime sync capabilities.

A macOS audio utility that automatically pauses music, controls per-app volumes, and records system audio.

A glib-like cross-platform C library providing modules for streams, coroutines, containers, algorithms, and more to simplify C development.

A simple, fast, robust job/task queue for Node.js, backed by Redis, designed for short real-time jobs.

Open-source supply chain security scanner that automatically detects vulnerabilities like Log4Shell in dependencies and notifies via GitHub pull requests.

Node-RED packaged as an addon for Homematic CCU3 and RaspberryMatic, enabling visual smart home automation.

A Rust binding library for nanomsg, a high-performance messaging system and ZeroMQ successor.

A complete alternative to Overleaf with VSCode, web, Git, Copilot, grammar/spell check, and live collaboration, based on GitHub Codespaces.

Grunt plugin to optimize PNG and JPG images using the reSmush.it web service.

An open-source Q/A social network where users ask and answer questions publicly or anonymously.

A cross-platform framework for working with schematized data, now archived as of March 2025.

A headless Node.js CMS for modern publishing, memberships, subscriptions, and newsletters.

A full-featured computer algebra system (CAS) written in pure Python for symbolic mathematics.

A cloud-native, open source API gateway written in Go, supporting REST, GraphQL, TCP, and gRPC protocols.

An open-source productivity launcher for quick application launching, web searches, file navigation, and calculations.

A unified tool that manages development tool versions, environment variables, and project tasks from a single configuration.

A GitLab Composer repository that indexes all projects with composer.json files across branches and tags.