Yup, a lot like pro-tab or that windows equivalent. You must be running Linux or some variant thereof, have been running Ubuntu on my laptop for a few months and also installed tuxguitar. Seems to work well, although the really helpful "help" files are not so useful. Experimentation is the trick (and a good memory for what you did last time that worked).
Free is always a good price and a fair reason to play around with Linux. I have found a few applications though that don't really work as well as represented without a bit of fiddling with the programs, for which a small understanding of writing software is helpful.
Take Care;
Doug
"what is this quintessence of dust?" - Shakespeare