Networking / System

Ever wondered how many programs start automatically with your Windows ?. How these programs slow down your PC, use Sysinternals AutoRuns utility to inspect your registry. Autoruns

A very good and open source solution for controlling spam, viruses. It supports multiple domains and it is GNU/Linux (Debian) based. It has a very easy to use Web interface for configuration. It supports any SMTP server and outgoing load balancing. Mail Cleaner

An Open Source alternative to hardware based firewalls with IPS Web Filter Virus Blocking Phish blocker Firewall VPN Support Protocol Support Routing and QoS Untangle