Mozilla Firefox
A free web browser with options that will charm weekend warriors and power users alike.
Sygate Personal Firewall
One of the best firewalls around, free or otherwise, without the conflicts of most firewalls.
AVG Anti-Virus
One of the most widely used free antivirus suites.
Free Download Manager
Truly one of the best download managers. The top link is the Subliminal Visions' version. The bottom link is the generic version.