A portable application can be run from a removable drive (USB flash drive, iPod, portable hard drive, etc) on any Windows computer without installation.
You will carry the program with settings on removable drive and don't modify settings on host computer.
Below portable apps are in a simplified PortableApps standard.
Tested on Windows XP Pro SP3 and Windows 7 Integrale since 22 october 2009.
On Vista and 7 turn off User Account Control (UAC) or run launcher as admin.

More portable apps (reported to Blogger by Adobe and Techsmith) can be found here.