Chrome Developer Tool - Develop and Debug Chrome Apps & Extensions. By Google
Shuffle for Bootstrap - Bootstrap drag and drop builder for busy developers.
Spaceship ZSH - Powerful, customizable Zsh prompt, your own spaceship 🚀
Rage Grade by FullStory - Benchmark your customer frustration
GitHub Student Developer Pack - The best developer tools, free for students.
Timeline.io - Visual collaboration tools for devs, designers, and clients.