Chrome Developer Tool - Develop and Debug Chrome Apps & Extensions. By Google
Sitemod - Modify any website in real-time. Share it with the world.
Spaceship ZSH - Powerful, customizable Zsh prompt, your own spaceship 🚀
VisualSitemaps - Autogenerate visual sitemaps in seconds.
GitHub Student Developer Pack - The best developer tools, free for students.
Transformicons - Animated icons, symbols and buttons using SVG and CSS