Find the best open-source alternatives

A free and open-source cross-platform functional testing solution for APIs and web services.

A lightweight Elixir library for parameter validation and casting using Ecto.Schema, similar to Rails strong parameters.

A web control panel for deploying applications on your own servers using Dokku.

An AI agent skill providing cheap, comprehensive X (Twitter) data access via 121 REST API endpoints, MCP tools, and bulk extraction capabilities.

A universal state management SDK offering signal-based reactivity with three paradigms (Store, Atom, Proxy) and support for all major JavaScript frameworks.

A fast HTTP client for Common Lisp with neat APIs and connection pooling.

A libre file transfer client for macOS and Windows supporting FTP, SFTP, WebDAV, Amazon S3, Azure, OneDrive, and more.

A free, open-source desktop app for AI coworking with built-in agents, multi-model support, and 24/7 automation.

A mind-mapping application for Elementary OS with extensive formatting, import/export, and brainstorming features.

A Swift SDK for sending app analytics from iOS, tvOS, and macOS apps to a Matomo server.

Official Angular SDK for Stream Chat, providing components and services to build chat applications.

An open-source machine learning framework for building classical, deep, or hybrid ML applications with a focus on performance and portability.

A modular natural language processing library for Node.js and React Native, designed for building multilingual chatbots and language utilities.

A high-performance, low-memory JSON diff and patch library for System.Text.Json with RFC 6902 support.

An open source, self-hosted live video streaming and chat server for complete ownership of your live streams.

A pure Go library for accessing Raspberry Pi GPIO pins without external C dependencies.

An open-source, Rust-powered productivity launcher for quickly accessing apps, utilities, and workflows via a popup interface.

Open-source software for remote control of DSLR cameras via computer.

A free and open-source BitTorrent client written in C++/Qt, offering a fast, stable, and feature-rich alternative to other clients.

A free and open-source parametric 3D CAD modeler for designing real-life objects of any size.

A logical replication extension for PostgreSQL that enables high-performance, cross-version data replication and upgrades.

A .NET library for reading and writing Office formats (Excel, Word) without requiring Microsoft Office installation.

A lightweight C++20 testing framework focused on minimal heap allocation and fast compilation.

An open-source online video platform for transcoding and packaging video files into HLS streams using FFmpeg and Ruby on Rails.

A framework built on Starling that adds FlashPunk-inspired structure and organization to 2D game development.

A latent text-to-image diffusion model that generates detailed images from text prompts, running on GPUs with at least 10GB VRAM.

A JavaScript library for building high-performance interactive 2D graphics and animations on the HTML5 Canvas.

A GIMP plugin and command-line tool for importing and exporting Game Boy tilemaps and tilesets to/from GBDK, ZGB, GBTD, and GBMB formats.

A Slack webhook app that creates anonymous public chat channels for external user support.

A lightweight Ruby tool that automatically restarts applications when filesystem changes are detected.

A PCI-DSS compliant card data handling system built on PostgreSQL and PL/pgSQL for secure payment processing.

A free open-source collaborative system for document management, CRM, project management, and email aggregation.

A command-line tool for launching Apache Spark clusters on AWS EC2 with fast, configurable deployments.

A simple and fast JSON parser implemented in ANSI C with a reference-counting object model.

A lightweight state management library for Angular using Services with RxJS or Signal, designed for simplicity and Angular's dependency injection.

A responsive layout framework for Ember.js focused on performance and maintainability with minimal runtime overhead.