A while back, probably a year ago, somebody here linked an online code interview tool that lets you send a programming problem to a candidate, and they can solve the problem at their own time, but the tool allows you to see, as the employer, the progression that the candidate makes when they wrote the code. So you can see what they were typing, what they deleted, how long it took and so on, where they struggle and so on.

I believe it also includes a whole bunch other statistics too.

I just can't remember the name. I signed up to their email list too, but since I don't know what they are called, I don't know what to search on my mailbox. Can anyone remember?

OK there seems to be a lot of them now with similar features. They are not what I was looking for, but it makes no difference.

At my last interview they just had a timed web page with a problem and a text field to write into. It wasn't indicated and I didn't look into it further but I strongly suspect they were taking snapshots of the code at regular intervals since the page required an "uninterrupted internet connection". That's all I can recall though.

We use InterviewZen.com

Its a web page with a bunch of problems on it and it records their progress as they do them. I don't think there is any other statistics though, just a raw recording.

Its nice because its easy to share with others for review.