Best open-source Developer Tools projects

A scriptable, single-binary MITM proxy in Rust for inspecting, intercepting, replaying and rewriting HTTP, HTTPS and WebSocket traffic from a TUI, web GUI or CLI.

A rootless Android app that boots a real Alpine Linux VM so you can run Podman, Docker, LXC containers and X11 GUI apps on your phone.

Open-source Java application for load testing and measuring the performance of web applications and other services.

Windows desktop app for Python-based ADB control of Android TV boxes: debloat, sideload APKs, and set up a custom launcher.

A Python drive imaging and formatting utility for Linux, inspired by Rufus, for creating bootable USB media from ISO images.

A fast, SIMD-optimized command-line tool and Node.js library that compares two images pixel by pixel and produces a diff image.

Open-source tool that turns a USB drive into a multiboot stick: copy ISO, WIM, IMG, VHD(x) and EFI files and pick them from a boot menu.

A lightweight, user-friendly terminal UI for writing disk images to USB drives and SD cards, with hash checks and post-write verification.

Open source, cross-platform, user-mode driver for graphics tablets, running on Windows, Linux and macOS with a configurable GUI.

A desktop GUI for Android app testing with ADB, supporting Windows and macOS, with device listing, shell commands, text input, screenshots and virtual displays.

Electron menu bar app that lets AI coding agents render diagrams and previews, and lets you annotate and approve them on screen.

A terminal TUI and CLI for browsing and downloading specific files or folders from GitHub, GitLab, Codeberg, Gitea and Forgejo without cloning.

A Go CLI for saving tmux sessions, windows, panes and running commands, then restoring them lazily from a TUI picker.

A cross-OS terminal UI and docs hub that automates setting up Windows, Linux, macOS, WSL2, Google TV with Stremio, and Home Assistant.

A web-based visual configuration generator for the Ghostty terminal that exports a minimal config file.

A QEMU wrapper that automatically downloads operating system images and launches optimised Windows, macOS and Linux virtual machines.

A smarter cd command that learns your most-used directories and lets you jump to them with a few keystrokes, across all major shells.

A scaffolder that generates an editable Astro documentation site into your repo, with agent-readable Markdown and llms.txt output built in.

A minimal Rust-built statusline for Claude Code showing model, Git state, workspace, and context window usage in the terminal.

A GPU-rendered terminal emulator in Rust whose background server keeps shells and panes alive after the window closes, with agent-aware sessions and SSH remote work.