First is ClarkConnect. For those of you who are familiar with IPCOP, Clarkconnect is 100000 times better. Its a custom linux distro (dont worry you dont need to know linux) that acts as one heck of a firewall/gateway. Also it can act as an FTP server, home file server, and just about anything server. The best part of it...RTG graphs!!!!!!! Show graphs of your network in and out ETC.... If you are wanting to get a little more hot and heavy into your network and wanting to control a little more of your network, I STRONGLY SUGGEST giving this a try. It wasnt that hard to setup and will support those with DSL/PPPoe. A simple installer.
http://www.clarkconnect.com/

The next one, I am new to today, is FREENAS. Basically will take a computer and turn it into what it says. A NETWORK ATTACHED STORAGE DEVISE. It has built in differential and incremental auto backup and stuff like that. It runs off of freeBSD (again you dont have to know anything about linux)
http://www.freenas.org/

Both of these program once installed onto a computer are controlled via a web interface and is all controlled from there, so you dont have to interact with linux directly. If you have been using these programs for a while let me know i would to know more.
Again PLEASE SUBMIT SOME IDEAS!!!!!!!!!!!!