Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
codebunk - Realtime Collaborative Editor with Code Execution, REPLs and Chat
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Floobits - Floobits brings real-time collaborative editing to text editors, IDEs, and now Atom.
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.
coderpad - Collaborative code editor with in-browser, real-time execution. Conduct programming phone screens like a boss.