An online store that specializes in spare parts for and discount UNIX servers and high-end workstations. They have machines and parts for Sun equipment, Dell, HP, Rackables, and Supermicro. A lot of this gear used to be horribly expensive, so hobbyists and sysadmins on slim budgets often have to search long and hard for replacement components.
A utility which monitors routers by logging into them, pulling the config files, and comparing them against known-good files to see if anyone's been monkeying with them. Supports Cisco, Juniper, Foundry, Redback, ADC, MRT, Alteon, and HP gear, probably more.