VirtualBox
VirtualBox is a powerful x86 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL).
Presently, VirtualBox runs on Windows, Linux, Macintosh and OpenSolaris hosts and supports a large number of guest operating systems including but not limited to Windows (NT 4.0, 2000, XP, Server 2003, Vista, Windows 7), DOS/Windows 3.x, Linux (2.4 and 2.6), Solaris and OpenSolaris, and OpenBSD.
TrueCrypt
permet d'encrypter les données sur un stick mémoire USB de manière transparente, important en cas de perte de la clé, etc.
KeePass
coffre-fort de mots de passe, montrer comment gérer toute sa panoplie de mots de passe sans danger
Toucan
http://portableapps.com/apps/utilities/toucan
Toucan is a custom built portable app for advanced users to synchronise, backup and encrypt their data, wherever they are.
7Z
7-Zip is a file archiver with a high compression ratio.
