Chrome Developer Tool - Develop and Debug Chrome Apps & Extensions. By Google
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Spaceship ZSH - Powerful, customizable Zsh prompt, your own spaceship 🚀
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
GitHub Student Developer Pack - The best developer tools, free for students.
pretix - pretix helps you to sell tickets for your event in an easy way. It supports multi-lingual events and provides a wide range of features