Great program. I've started using it for keeping track of time when shooting air pistol and given the following features below it would be a great shooting timer (let me know if you need more information should you care to implement them):
Keep backlight on at countdown (regardless of other settings).
Mark by sound (a bullet hit); see for example http://sourceforge.net/projects/shottimer/).
Warning at half time, 1/4 time, ten minutes left et c (to let the user know how much time is left).
Two timers at same time (in an air pistol competition men get 1 h 45 min and 60 shots, 75 seconds/shoot). Possibility to see a 75 sec timer at the same time as the overall timer. This time should be reset for each mark and start over automatically.
Stop timer at mark # n (that is, 60).
It would be truly great if you could add any of the features above. Let me know if you need any help.