While working on anything from an AP History essay to a Masters' thesis,  allows you to bring your .doc or .docx files along for the ride, storing them on your iPhone or iPod touch in full formatted glory. At $5 for the Microsoft Word version, Docs To Go is inexpensive, allowing you to do real work instead of settling for a watered down "text only" version.  Format, cut and paste, and find and replace to your heart's content. Now you can feel free to jab out that research paper late into the night, and worry about getting the style right on the bus. APA formatting never looked so good.

The iPhone's built-in calendar is nice enough, particularly if you turn the device on its side to access more advanced functions. Still, today's math courses require some serious number crunching. And the beast most professors are looking for is the Ti83, faithfully recreated by PigLit as the . Tally statistics, algebraic functions, trigonometry and other fun stuff all without spending a fortune--the app costs $1--or carrying a giant, geeky calculator. Graphing not your thing? Try the $5 or the $15 , both from Thomas Fors, for great apps representing two other popular devices.