Interviews on Skype - Test candidates using a real-time code editor over Skype
codebunk - Realtime Collaborative Editor with Code Execution, REPLs and Chat
coderpad - Collaborative code editor with in-browser, real-time execution. Conduct programming phone screens like a boss.
Floobits - Floobits brings real-time collaborative editing to text editors, IDEs, and now Atom.
Adaface PairPro - Conduct Pair-Programming Interviews Remotely
CodeSignal - CodeSignal is the leading assessment platform for technical hiring.