Find the best open-source alternatives

A powerful, interactive JavaScript charting and data visualization library for the browser.

A self-hosted music scrobble database for creating personal listening statistics and charts.

A sandbox framework for fast prototyping of tile-based games in HTML5 and JavaScript.

Automatically build and rebuild Xcode image catalogs for iOS/macOS app icons and universal images from source assets.

A Wagtail add-on for managing scripts and tags with built-in cookie consent and GDPR compliance.

A browser-based music tracker that plays and edits Amiga MOD and FastTracker XM files using plain JavaScript.

A personal Dynamic DNS client that updates DNS records using Digital Ocean's DNS backend.

A Cloud Foundry buildpack for deploying Ruby, Sinatra, and Rails applications to the platform.

A general-purpose, web standards-based PDF viewer built with HTML5 and JavaScript.

A multi-line editor control for Lazarus with syntax highlighting, multi-carets, word-wrap, and a mini-map.

A WebSocket framework that enables real-time, reactive frontend-backend communication by syncing SQL queries and server-side data.

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

A lightweight and fast JavaScript parser for TTF, OTF, TTC, and WOFF fonts with SVG and variable font support.

A delightfully simple 2D game engine for the D programming language, designed for fast and fun development.

A safe, customer-facing template engine for flexible web applications with beautiful markup.

A desktop application that converts clipboard text into speech, allowing background audio narration of web pages.

A Windows desktop application for capturing screenshots, screen recordings, webcam, audio, mouse clicks, and keystrokes.

Open-source, cross-platform video compositing software with a node-based workflow for visual effects and motion graphics.

A powerful macOS desktop automation tool that bridges system APIs with a Lua scripting engine.

A distributed storage system for object storage (S3), file systems, and Iceberg tables, optimized for billions of files with O(1) disk access.

A collection of pure-Rust computer vision libraries providing algorithms for photogrammetry, image processing, and pattern recognition.

A Go SDK for AI applications providing a unified API across 22+ providers with streaming, structured output, and MCP support.

A self-hosted online file converter supporting over 1000 different formats across documents, images, video, and more.

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

A free and open-source 3D voxel editor for creating graphics from cubes, available on desktop and mobile platforms.

A free, fun-focused kart racing game with no realistic physics, offering single-player and online multiplayer modes.

An open-source Zigbee to MQTT bridge that lets you control Zigbee devices without proprietary vendor gateways.

Legacy open-source collaboration and project management software inspired by Basecamp, Yammer, and Twitter.

An extremely fast Python package and project manager written in Rust, replacing multiple existing tools.

A priority task queue implementation using Vert.x and Redis, inspired by Automattic/kue.

A simple, open-source lossless audio codec with good compression ratios, written in C++.

A fast, easy, and feature-rich JSON serializer for Ruby, JRuby, and TruffleRuby with no runtime dependencies.

A static code analyzer that detects security vulnerabilities in C# and VB.NET applications.

A multi-track audio editor and player for the web with canvas waveform preview, drag-and-drop editing, and Tone.js effects.

A versatile open-source tool for interfacing with and debugging digital electronics through a USB-connected FPGA board.

A Neovim plugin for AI-assisted coding with transparent tool use, sub-agents, and OS-level sandboxing, focused on the Anthropic Claude models.