A number of games at Reflective Arcade (
www.reflexive.com) are suitable for a cab, althogh a lot of them would need a trackball.
Try before you buy though, some of the games are not worth the money.
A new favorite for my kids is "feeding frenzy".
That's also where you'll find platipus, already mentionned in this thread.
EDIT: in fact other software mentionned in this thread is available on this site, even software that I have purchased through other sources (directly from the developer) , like Warblade.
Edit again: All games come with a built in 1 hour trial
Also, there seems to be both a reflexive.net and reflexive.com, I'm not sure what the difference is between the two. It's obviously the same company but I'm not convinced the mix of games is the same between the two.