The previously mentioned Firefox Campus Edition is now available for download! The new edition comes with three extensions pre-installed:
FoxyTunes - allows you to control your media player from within Firefox. FoxyTunes can also find lyrics, covers, bios, videos, and more.StumbleUpon - helps you find different websites, videos, and photos based on your interests from within Firefox.
Zotero - a research tool that collects, manages, and cites your sources from within Firefox.
If you are already using Firefox (and if your reading HackCollege you probably are) you can just download the extensions individually from here: FoxyTunes, StumbleUpon, and Zotero.
Firefox Campus Edition is still absolutely free to use and can be download here.