FileTruster
FileTruster is an application that can cipher your choosen files (not the entire disk like BootTruster) using your Trusted Platform Module key.
It can for example, prevent a hacker from reading your data when he had stolen your files, because of the need to have the correct key in the Trusted Platform Module.
It can also permits you to backup data on media like cd, dvd, usb key, external hard drive. If someone is trying to read your backup with another computer, all data will be unreadable.
Here is a small video that represent a test of the FileTruster capabilities.