Blocks all externally originated IP traffic, making computer invisible to outsiders. Also detects alterations to files so as to block Trojans. Free for personal use. Site contains overview, manual, FAQ, screenshots and prices.

A secure email server with webmail, anti-virus and anti-spam protection, allowing to collaborate via email, shared contacts, calendars and tasks.

Secure corporate mail server with anti-spam defense, collaboration features and customizable WebMail for Mac OS X. Available with integrated McAfee Antivirus.