Online Armor's broad range of Personal Firewall Features help keep you safe when surfing the internet.

GMER is an application that detects and removes  rootkits .

LockThis! is a tiny Windows utility that makes it possible to password protect almost any programs or documents that's currently running/open. This tool is perfect for people who often lend their PC to others, because with this tool they can keep the content of some programs or documents from other people eyes without need to close them first.

Spybot - Search & Destroy detects and removes spyware, a relatively new kind of threat not yet covered by common anti-virus applications.

Securely sending or storing data can be tricky if you don't have a robust security infrastructure. We make encryption easy for you with Sophos Free Encryption.  This free tool lets you secure your data easily and quickly without any central infrastructure in place. Individuals and businesses alike can easily protect selected files for email communication without building up a costly back-end PKI infrastructure.

This tool can run on any hard disks and almost any removable storage (like USB disks) where you have deleted some sensitive data so nobody will be able to restore it.