Ease of use is it main feature. Winproxy is proxy type internet sharing software. Maximum configurability is its main feature. Has support for Internal, External, and PSN networks. VERY handy for people with a network card that needs to change settings often, or needs to reconfigure for a LAN party.
Registration is extremely affordable.
Sygate Personal Firewall is a utility that monitors your computers network interfaces to protect against attacks. It's surprising what tries to access the internet without you knowing it. Free for Personal use. SiSoft Sandra - Benchmark and System Information tool. You've seen it used in hardware reviews.