Find the best open-source alternatives

A drag-and-drop website builder and CMS with built-in e-commerce capabilities, built on Laravel.

A high-performance, multi-process, multi-fiber Rack-compatible web server for Ruby with native HTTP/1, HTTP/2, and TLS support.

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

Data-driven API middleware for Node.js/Express with an admin interface for creating REST endpoints from JSON schemas.

A minimalistic workflow engine for JVM that defines workflows as Java functions and runs them as Apache Kafka Streams processors.

A free, hosted integration platform for developers to connect APIs and build event-driven automations with 1000+ pre-built apps.

A high-performance C++ thread pool and parallel algorithms library for compute-bound workloads, designed as a sanitizer-clean alternative to OpenMP and TBB.

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

A curated list of starters, examples, guides, and resources for the Neon serverless Postgres database.

An open-source hybrid integration platform for connecting applications, data, and systems with enterprise-grade features.

Automatic version management and state recovery tool that works with any language and stores versions in git tags.

A Windows OpenGL function call interceptor that logs all OpenGL calls for debugging and analysis.

An open-source fantasy computer for creating and sharing tiny retro games and programs, built with LÖVE.

An open-source metrics pipeline and monitoring system for enterprise cloud-native infrastructure, built on OpenMetrics for interoperability.

A community-maintained movie database built on the AT Protocol, offering IMDb/TMDB-like functionality.

A standard library for JavaScript and TypeScript with an emphasis on numerical and scientific computation.

A high-performance, memory-efficient, and scalable HTTP/1.1 web server for OCaml, built with Angstrom and Faraday.

A clean, simple, and powerful web application for managing, importing, and organizing family recipes.

A macOS app that captures your screen and saves it as a layered PSD file for easy editing.

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

A stable, mature Objective-C library for Twitter's REST API 1.1, offering comprehensive access and flexible authentication.

A C# library providing an Entity Framework-like interface for MongoDB, featuring change tracking, fluent mapping, and entity buckets.

A minimalist Ruby web framework for building Rack applications with a focus on simplicity, maintainability, and performance.

A single C source file library implementing zlib compression, PNG writing, and ZIP archive manipulation with MIT licensing.

A .NET library for automated UI testing of Windows applications using Microsoft's UI Automation framework.

A Go package for detecting MIME types and file extensions based on magic numbers, prioritizing common formats and supporting extension.

A static API documentation generator that creates beautiful, responsive documentation sites from Markdown files.

A browser-based space exploration game featuring procedurally generated, infinite star systems with seamless planetary travel.

A utility for Sitecore that serializes and syncs database items (templates, renderings) across environments using source control.

A file-system activity monitor for continuous compilation and reloading of Erlang files and templates.

A lightweight ETL library and data integration toolbox for .NET, enabling programmatic data flow pipelines.

Example Fuse app demonstrating Firebase integration via REST API as an alternative to Parse.

A durable background task queue and workflow orchestration platform built on Postgres with observability and flow control.

A REST and MQTT gateway for HomeMatic CCU home automation systems, enabling secure access and integration of third-party devices.

A free, decentralized, and federated video streaming platform using P2P and ActivityPub to avoid vendor lock-in.

Provides Rust toolchains, rust-analyzer nightly, and VS Code extensions for Nix, serving as a replacement for rustup and nixpkgs-mozilla.