There is also Pactor which is used extensively by the WinLink 2000 system. It is a fairly fast protocol (relative to what you get with other HF data protocols).
The only downside is it requires a proprietary TNC (ie, modem) which is not cheap.

The LitterRobot is great. Dump that other piece of DRM'd crap and get yourself a LR, you will not regret it!

Yeah, and don't forget email.....wonder why no brilliant HR person has demanded to have a candidate's email password so they can snoop there as well.