Heh, good one! So many of these devices run on one of a few OS platforms, generally some form of Windows CE - which is still around and going strong. Heck, AFAIK all of the total stations and loggers I've used are skinned UIs running on top of either Win CE 5 or 6, and the TomTom and Garmin GPS units we use CE 6.0. Win XT might also be "out there" - MS has a pretty good lock on these kinds of devices. On the other end - most consumers that invest in these units (buying more than one in a lifetime, that is), from contractors to engineers (like me) to GIS staff - have Windows in their offices and it's all the techs know how to use.
Also, I'll echo what admwright offered - they have a sourceforge depository, I forgot to mention it as I'm relocating to a new location and have been a bit busy. Their project web portal is here, with Mac software that's surprisingly powerful:
http://sourceforge.net/projects/bt747/ - it facilitates data dumps, geotagging of JPEG files, file conversion, and it has integration with Open Street Map. Macs, Linux boxes, and Windows PC are all welcome!