Microsoft BitLocker - BitLocker is a full disk encryption feature included with Windows Vista and later.
Spamihilator - The free Anti-Spam-Filter Spamihilator removes more than 98% of spam mails before they even get into your inbox.
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.
SpamAssassin - Use this program to "Unspam" your mailbox(es).
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.
Mailwasher - Over 8 million people use MailWasher as their spam filter