FireFox is considered the most secure browser available. Running from the USB flash drive, FireFox covers your surfing tracks and does not leave digital footprints behind. Shoulder-surfing protected and pre-loaded with dozens of security features.
ClamWin AV is a powerful stand-alone anti-virus and anti-malware tool with high detection rates. Comes preconfigured with the latest database of virus definitions and runs from the USB drive.
ThunderBird is a very secure and private email client that is far more robust and sophisticated than the popular Microsoft Outlook. ThunderBird runs from the USB drive and can be enriched with hundreds of free plugins.
Tor is an extremely sophisticated web surfing anonymizer. Running from FireFox, it connects to a vast network of anonymizing proxy servers to completely mask your identity and protect you while online. This is the
most sophisticated and secure anonymizer available.