My sister's boyfriend gave her an iBook G4 for Christmas. The spec isn't bad and I've been updating it and installing a few bits and pieces for her today.
Since she's a fulltime student she needed some form of word processing package, so I opted for NeoOffice, which is a Mac port of OpenOffice. I also installed Firefox and Acrobat Reader.
As far as I know she only uses MSN, so Adium would be overkill.
What other software would people recommend for a student? Ideally it should be free or open source, but if it's a really worthwhile addition I don't mind forking out for a license.
I can't think of anything offhand...