Gimp - Image editor which allows you manipulate images similiar to Photoshop.
Inkscape - Vector graphics editor simliar to Illustrator.
Open Office - Productivity suite with applications simliar to Word, Excel, Power Point, and Access.
Thunderbird - Open sourced email suite, simliar to Outlook
AVG Anti-Virus - A virus protection program that provides security at no cost.
Adobe PDF Reader - Open Portable Documents with Adobe Acrobat Reader