Find the best open-source alternatives

A highly configurable window management application for macOS that replaces Divvy and SizeUp with keyboard-driven window control.

A high-performance NoSQL database compatible with Apache Cassandra and Amazon DynamoDB, built on a shared-nothing architecture.

Mesh simplification library that preserves UV seam boundaries for seamless texture reuse across decimation levels.

A Go library implementing collaborative filtering algorithms for recommendation systems, including ALS, Bayesian, and similarity-based approaches.

A desktop UI management tool for InfluxDB, providing database administration, query execution, and data exploration.

Open-source software for stacking astronomical images of planets, moon, and sun using lucky imaging techniques.

An open-source reimplementation of the 1997 business simulation game Theme Hospital, with modern OS support and new features.

A high-performance, easy-to-use, and scalable machine learning package for linear models, factorization machines, and field-aware factorization machines.

A customizable cross-platform graphical process and system monitor for the terminal.

An open-source mobile app for developers to connect through local meetups, built with React Native.

A fast, safe, thread-friendly regular expression library with linear-time matching guarantees, designed for production use.

An Arduino/Raspberry Pi tool to scan for JTAG pins and enumerate undocumented instructions on embedded devices.

An open-source authentication and user management solution with passkeys, MFA, OAuth SSO, and SAML support.

A lightweight time-series database written in Rust, deployable as an embedded library, standalone server, or scalable cluster.

A dynamic stylesheet language that extends CSS with variables, mixins, functions, and more.

A machine learning algorithm for accurate, energy-efficient outdoor positioning using 5G mmWave beamformed fingerprints.

A macOS QuickLook extension that adds thumbnail, preview, and metadata support for non-native video and audio file formats.

A cross-platform backup tool for PC video game save data, supporting over 19,000 games and multiple game stores.

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

A Python library for reading, creating, and updating Microsoft Word (.docx) files.

An open-source, self-hosted deployment platform that replaces Vercel and other SaaS tools with a single binary.

A pure Go, enterprise-grade GUI toolkit with GPU-accelerated rendering, reactive state, and modern widgets for building desktop applications.

IBM's open-source corporate typeface family, designed for global use and versatility across UI and print.

A scalable, distributed MQTT broker written in Rust, designed for high-concurrency IoT and M2M applications.

An open-source framework for building integrations and APIs with over 1000 pre-built actions.

A free and open-source sprite sheet creator that automatically packs images from a folder into optimized sheets.

A language-natural persistence layer for Java that treats the database as a sorted key/value store and implements everything else in Java.

A fast, minimal dependency manager and build tool for Erlang/OTP applications with rebar compatibility.

A fast, minimal dependency manager and build tool for Erlang/OTP applications with rebar compatibility.

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

An open-source ticket selling and event management platform built on Laravel, enabling organizers to avoid third-party fees.

A composable, all-in-one mail server that implements SMTP, IMAP, DKIM, SPF, DMARC, and more in a single daemon.

A container-based multi-feed client for ADS-B, MLAT, ACARS, and VDL2 data, designed for easy deployment to flight tracking aggregators.

A Bower-less asset manager for Sprockets that downloads and packages JavaScript and CSS libraries for Ruby web applications.

A free, open-source alternative to Spark UI and Spark History Server with enhanced CPU and memory metrics visualizations.

An open-source authentication and user management solution with passkeys, MFA, OAuth SSO, and SAML support.