Find the best open-source alternatives

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

Cross-platform GUI desktop application for managing Redis databases with an intuitive visual interface.

A Common Lisp library for declaratively reading and writing complex binary file formats and network protocols.

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

A JavaScript tool for populating JSON data with circular references, offering a transparent interface similar to Falcor and GraphQL.

An open-source Identity Provider (IdP) for modern SSO, supporting SAML, OAuth2/OIDC, LDAP, RADIUS, and more.

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

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

AWX is an open-source web UI, REST API, and task engine for managing and scaling Ansible automation.

A simple, secure, and high-performance C library for reading and writing PNG files, designed as a modern alternative to libpng.

A localization and translation tool for Delphi applications that replaces the standard Delphi Translation Manager.

A Ruby process monitoring tool inspired by Bluepill and God, built for production stability with advanced features like chained restarts and health checks.

A fast, small, and full-featured Inversion of Control container for .NET applications.

A minimal Neovim plugin for managing Markdown notes with a relational, flat-filesystem approach using dot-separated filenames.

An open-source macOS app for elegant window management with a customizable radial menu and keyboard shortcuts.

A fast, secure RubyGems server written in Go, offering self-hosted gem mirroring, caching, and private hosting.

An R package that extends ggplot2 to create publication-ready graphics with statistical details embedded directly in the plots.

A request/response inspector middleware for ASP.NET Core that captures HTTP traffic and provides a real-time web viewer for debugging.

A system monitor for macOS with customizable widgets and a modern UI, designed as a better alternative to Activity Monitor.

A fast, cross-platform image decoding library with clean APIs for C, C++, and Python, supporting 20+ formats.

An open-source AI engine that runs LLMs, vision, voice, and image/video models on any hardware with drop-in OpenAI API compatibility.

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

A Rust-powered interpreter for the Wolfram Language, enabling CLI scripting and Jupyter notebooks.

A modular Ruby toolkit for handling file uploads, processing, and storage with support for cloud services and multiple ORMs.

A pure Ruby syntax highlighter compatible with Pygments, supporting over 200 languages and outputting HTML or ANSI 256-color text.

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

A Python package that visualizes data structures, references, and mutability to aid debugging and teaching.

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

TypeScript decorators for building API services with the Oak framework using TC39 decorator standards.

Monitors AWS, GCP, OpenStack, and GitHub for policy changes and insecure configurations, tracking asset changes over time.

Automatically generates API client libraries, server stubs, and documentation from OpenAPI specifications.

A Godot 4 plugin that simplifies and enhances camera behaviors for 2D and 3D games, inspired by Cinemachine.

A CLI tool to share files and directories between your computer and mobile devices via QR codes, no app required.

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

An open-source music notation software for creating, editing, and printing sheet music with WYSIWYG design.

Real-time collaborative editing, remote cursors, shared terminals, and E2E encryption for Neovim, inspired by VS Code Live Share.