Seeing the other thread about a TI-84, I personally would like recommendations on useful games/apps.

Omnicalc is a very useful app (parentheses assistance, thousand separator, base conversion, ...).
http://www.ticalc.org/archives/files/fileinfo/226/22626.html

OK, lemee rephrase this: Something that's NOT math related

Oh forgot to mention one thing:
It modifies the entry thingie, so that if you press [2nd] + [enter] you get a menu with all the things you done in the past. That's not math related and with that you can also enable lowercase and hide the finance tab in the applications.

Try checking here for other things (contains almost everything for a ti84):
http://www.ticalc.org/pub/83plus/

Why don't you do some programming yourself? It's entertaining, especially during boring lessons...

Meh, I'd rather be playing Mario or something

Well, I've seen some Mario, Zelda, Metroid, Racing games I think, Role playing games....
Meh, just google around a bit, I had found them for my TI 83, although I don't have the transfer cable.

http://www.ticalc.org/pub/83plus/basic/games/
http://www.paetzke.com/ti83programs/

Still, making your own game would be fun

I'd have Mario for TI-84+. It just owns.