At my last gig we used Stypi or Google Docs plus a phone to do live code exercises, and CodePair likes like a step up from that. But what we're running at my c

At my last gig we used Stypi or Google Docs plus a phone to do live code exercises, and CodePair likes like a step up from that. But what we're running at my current gig is sending a trivial problem ahead (after an initial phone screen) and then asking for extensions over a Google Hangout with the candidate doing a screen share. This lets people work their way in their own environment with the language of their choice, and do any boilerplate or other overhead up front. It's not perfect - I'd prefer not to require someone use or make a Google+ account, but it's the best I've seen so far.