yeah, sort of. i use the following programs (they're freeware) to figure
out max no-deco times at depth. these are the ones i use; they are simple,
and they work:

Nitrox Calc. v. 04 : this one is nice because you can calculate max depth and time for any nitrox mixture (including 21% plain vanilla air).

http://www.freewarepalm.com/hobbies/scubatoolsdivecalc&divelogger.shtmlScuba Tools DiveCalc & DiveLoger v.1.5: this one is REALLY nice because you can calculate up to four dives in a row, and it will show you all the nifty info
(such as minimum surface interval, residual nitrogen, etc.) Not as easy
to use, but even I figured it out in about a minute.
and did i mention they are free? =)