I have yet to understand why HN:ers like HackPad. It is at best almost as good as GDoc:s on some of the features.

The reason I've seen it used is that it's open source and therefore can be hosted by the entity involved.

It is?!

Where's the source code? Their GitHub page is rather sparse, and the only hint I've found is this tweet:

https://twitter.com/hackpad/status/407651583598813184

Sorry, I'm thinking of Etherpad:

http://etherpad.org/

The source code of which is here:

https://github.com/ether

Hackpad is apparently a fork of that:

https://hackpad.com/Whats-the-difference-between-Hackpad-and...

Cool, thanks!