Free Software alternatives to Big Name software titles, saving you big $$$

UPDATE: NOW YOU CAN INSTALL ALL OF THESE QUICKLY AND EASY WITH NINITE (FREE)

Office Suite
 - OpenOffice - How to make it default to Microsoft Formats when saving (.doc .xls .ppt)
 - OpenOffice Novell Edition (Same but with a few extra features, requires you to register on the Novell Site for downloads, this is the one I use personally)

CD / DVD Burning and Playing software
 - CDBurnerXP
 - VLC

Antivirus - These are both ok products, I use AVG myself.  If you want more protection, I'd recommend Norton Internet Security Software
 - AVG Free Edition
 - Avast Free Home Edition

Software Essentials:
- Java
- Codecs (for video / audio playback)
- Adobe Reader

Several more great items can be found here: Open Source Windows

Are you looking for some sort of software that is not covered by what I've listed?  Please ask in the forum, I'm sure we can find something that will fit your needs.