Xobin - Most Comprehesive Pre-Employment skills testing and Psychometric Assessment Platform.
codebunk - Realtime Collaborative Editor with Code Execution, REPLs and Chat
After Interview - Get feedback from job interviews to improve
Floobits - Floobits brings real-time collaborative editing to text editors, IDEs, and now Atom.
Interviews on Skype - Test candidates using a real-time code editor over Skype
coderpad - Collaborative code editor with in-browser, real-time execution. Conduct programming phone screens like a boss.