VaultletSuite 2 Go is privacy protecting software that installs on your hard drive or your thumb/USB drive. It uses Open Source 2048 bit RSA public key and 256 AES encryption, and provides easy-to-use (transparent) encrypted and controllable email and password protects important files.
Portable Thunderbird is the popular Mozilla Thunderbird email client packaged as a portable app, so you can take your email, address book and account settings with you.
UBCD4Win is a bootable CD which contains software that allows you to repair/restore/diagnostic almost any computer problem. UBCD4Win is based on Bart's PE
TrueCrypt is a free open source on-the-fly encryption (OTFE) program for Microsoft Windows XP/2000/2003 and Linux. It allows one to create a virtual encrypted disk within a file and then mount it as a real disk
VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, ogg, ...) as well as DVDs, VCDs, and various streaming protocols.
Spark is an Open Source, cross-platform IM client optimized for businesses and organizations of all sizes. It includes enterprise-class features such as built-in support for group chat, telephony integration, and strong security.
FreeNAS is a free NAS (Network-Attached Storage) server, supporting: CIFS (samba), FTP, NFS, RSYNC protocols, local user authentication, Software RAID (0,1,5) with a Full WEB configuration interface.