PortableApps Suite is a collection of 100% FREE portable apps

PortableApps Suite (Lite Edition): ClamWin Portable (antivirus), Mozilla Firefox - Portable Edition (web browser), Gaim Portable (instant messaging), AbiWord Portable (word processor), Sudoku Portable (puzzle game), Mozilla Sunbird - Portable Edition (calendar/task manager) and Mozilla Thunderbird - Portable Edition (email client) and runs comfortably from a 256 MB drive.

PortableApps Suite is a collection of portable apps including a web browser, email client, office suite, calendar/scheduler, instant messaging client, antivirus, sudoku game, backup utility and integrated menu, all preconfigured to work portably. Just drop it on your portable device and you're ready to go.