Defraggler differs from other defragmentation tools on the market, by enabling you to quickly and simply defrag the files you want to, without having to process the whole drive. The version you will find in this topic is packed so it can run straight from your U3 enabled USB device.  

A user contibuted a U3 Screenshot grabber, much like Cropper for U3 posted elsewhere on this site. Although this program does not support any of the advanced features Cropper does, it is a usefull and “no nonsense” utillity that allows you to make screen captures fast & easy.

CCleaner for U3 is a freeware system optimization, privacy and cleaning tool that can be run from your U3 capable removable drive. It removes unused files from your system - allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally it contains a fully featured registry cleaner. But the best part is that it's fast.

ClamWin 0.94.1 for U3 is a Free Antivirus program for Microsoft Windows 98/Me/2000/XP/2003 and Vista to be run from a U3 capable removable drive, it has high detection rates for viruses and spyware.

SanDisk released a new version of it`s U3 Launchpad software that should resolve Vista compatibility issues for U3 disks with firmware 2.17, 2.18, 2.19, and 2.20. Unfortunatly this update broke my U3 Drive! Be carefull!