Today's GitHub trending page is dominated by three developer tools, with over 120k stars combined. They solve different problems, but point in the same direction: making the invisible parts of development visible.
witr: Find out what actually started that process
One of the most annoying questions in ops and development is the mystery process on a server, the occupied port, the container nobody remembers creating. witr is built to answer exactly that: one command traces any process, port, container, or file back to the exact chain that started it.
It has three output modes: human-readable text in the terminal, machine-readable JSON, and an interactive TUI. It supports Linux, macOS, Windows, and FreeBSD, with installers available via brew, conda, AUR, winget, and npm. When debugging, running witr first is usually faster than digging through systemd logs and ps output. The project is written in Go, has 21k stars on GitHub, and is Apache-2.0 licensed.
T3 Code: One surface to control all your coding agents
More and more developers run Claude Code, Codex, and Cursor side by side, with each agent working independently and progress scattered across separate terminal windows. T3 Code, from the t3.gg team, is an open-source agent control surface built to fix exactly that.
It supports Claude Code, Codex, Cursor, Grok Build, and OpenCode, and works with subscriptions you already have in those tools. Companion iOS, Android, web, and desktop apps let you check project progress and review changes from your phone. The authors are blunt in the README: they're not selling anything, they just wanted a performant, remote-ready, truly open agent control surface, and if it ever goes the wrong way, you can fork it and build your own.
Agent Skills: Package a senior engineer's workflow into your agent
Addy Osmani, an engineering lead on Google's Chrome team, maintains agent-skills, which recently hit the top of GitHub trending with 85k stars. It's a collection of packaged engineering skills, MIT licensed, 24 in total.
The skills cover the full DEFINE, PLAN, BUILD, VERIFY, REVIEW, SHIP lifecycle: idea refinement, writing specs, implementation, testing, QA gates, and shipping. Install them into Claude Code, Codex, Cursor, Copilot, Windsurf, and 70+ other agents with a single command: npx skills add addyosmani/agent-skills. It's like encoding the review standards of a senior engineer so agents follow the same bar every time.
All three projects are open source. Repo links are in the navigation below.