- chrome-devtools-mcp by ChromeDevTools, 56k stars. MCP server that gives coding agents access to Chrome DevTools
- mitmproxy by mitmproxy, 47k stars. Interactive intercepting proxy for inspecting and modifying TLS and HTTP traffic
- sentry by getsentry, 46k stars. Error tracking and performance monitoring for applications
- fmt by fmtlib, 26k stars. C++ formatting library, an alternative to printf and iostreams
- post-mortems by danluu, 13k stars. Public collection of software incident postmortems for study
- why-did-you-render by welldone-software, 13k stars. Monkey patches React to log avoidable re-renders during development
- renderdoc by baldurk, 11k stars. Standalone graphics debugger for capturing and inspecting frames in Vulkan and D3D
- icecream by gruns, 10k stars. Python debugging library that prints variables with context
- openidea by l0ng-ai, 9.0k stars. Native IDE in Rust with an IntelliJ-style keymap, debugger, Git and terminal
- raddebugger by EpicGames, 8.8k stars. Native multi-process graphical debugger for user-mode programs
- ESP32-Bit-Pirate by geo-tp, 6.4k stars. ESP32 hardware hacking tool with a web CLI for CAN, I2C and JTAG
- console by tokio-rs, 4.6k stars. Debugger for inspecting async tasks in Rust programs built on Tokio
- coz by plasma-umass, 4.6k stars. Causal profiler that measures how speeding up code changes performance
- x64dbg-mcp-server by duty1g, 2.8k stars. MCP plugin that exposes the x64dbg debugger to AI assistants over HTTP
- inspector by MCPJam, 2.3k stars. Web app to chat with, test and debug MCP servers and ChatGPT apps
- asm-hall-of-shame by xoreaxeaxeax, 995 stars. Assembly programs that show how badly CPU performance can be wasted
- nietzschian-debugger by DilawarShafiq, 560 stars. Debugging CLI that asks guiding questions instead of giving the fix
- gecko by ioncodes, 433 stars. GameCube and Wii emulator with a built-in debugger
- mcpsnoop by kerlenton, 368 stars. Terminal proxy that shows live MCP traffic and exports OpenTelemetry spans
- reloaderoo by cameroncooke, 127 stars. Proxy and CLI for inspecting and debugging MCP servers
- claude_code_vs by firish, 107 stars. Visual Studio 2026 extension adding diffs, a debugger and tests for Claude Code
- jean-claude by EtiennePasteur, 90 stars. Command-line HTTPS man-in-the-middle proxy for debugging Node traffic
- adOmnia by Andrea-Cavallo, 54 stars. Local-first Go IDE for running, testing, and debugging agent-written code
- time-travel-sqlite-debugger by nsrht, 45 stars. Records SQLite changes during development so you can step back in time
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