Портабл версия программы-менеджера-(и-генератора) паролей KeePass.

KeePass Portable is the popular KeePass Password Safe packaged as a portable app, so you can securely carry your email, internet and other passwords with you. You can place it on your USB flash drive, iPod, portable hard drive or a CD and use it on any computer, without leaving any personal information behind.

Комплекс мультиязычных OpenSource портабл-программ.
PortableApps.com Suite™ is a complete collection of portable apps including a web browser, email client, office suite, calendar/scheduler, instant messaging client, antivirus, audio player, sudoku game, password manager, PDF reader, minesweeper clone, backup utility and integrated menu, all preconfigured to work portably. Just drop it on your portable device and you're ready to go.

Отличная утилита для проверки вашего жесткого диска на ошибки и сбойные сектора.
И единственный известный аналог Scandisk (ChckDsk) Windows

Портабл-версия Антивируса Avira. For all those experiencing the damaging effects of a virus infection, Avira’s researchers have prepared a removal tool, which can be used to eliminate major distinct threats.