Yeah, probably not what you are looking for either, but i use BBIagent running on an ancient 486. It's just a bare motherboard mounted to a rack with two NIC cards and a floppy drive hanging off of it. It boots off the floppy and runs in RAM. It hasn't crashed or had to be rebooted in over 6 years, except in the case of my moving or a power failure, or me updating the software. It's SUPER easy to setup and offeres everything from a print server to bandwidth throttling, firewall protection, you name it. Sweet piece of OS software if ya ask me.