Hardware Tools

Cable Sense Adaptor

Allows Macs that use "cable sensing" to run without having a monitor attached to them. (including most Power Macs and some Quandras). With Timbukto Pro, facillitates racking and/or colocating servers. Available at Fry's and most electronics houses.

Interpol

Network security hardware. Firewalling, content blocking (CyberNot list, customizable), acccess authentication, network address translation, and protection against Internet attacks. Web interface for management.
By Sonic Systems Inc. Article.

ModemGuard

Power filter for reducing radio frequency interference (RFI) that can interfere with modem performence. Available in 120 and 220 volt models.
By Australian Protective Electronics.

PowerKey Pro Model 200

Advanced powerbar with system interface. Includes remote dialup system booting capability.
By Sophisticated Circuits Inc.

PowerKey Pro Model 600

Automatically restart computers. 6 individually controlled outlets. Can work with PageSentry to monitor up to 6 servers.
By Sophisticated Circuits Inc.

Roboot

Hardware box to help recover from 'frozen' computers. It listens to serial port for signal from a background application that runs on the Macintosh. If the signal is not recieved, the power is cut to the Mac (and optionally to peripherals) for 1/2 a minute and then turned back on.
By Icatt Tools Group.