SourceForge.net: Welcome to SourceForge.net is a great place to get open source software. I use PDFCreator at home to print PDF files. Thanks for the head's up on Foxit Reader...
I use 7Zip, VLC, CDBurnerXP (great free burning software), theGIMP is a great free alternative to Photoshop, Inkscape is comparable to Adobe Illustrator.