driverguide.com
With more than 100,000 downloadable drivers for every conceivable operating system and piece of computer hardware,
DriverGuide.com is indispensable when you're repairing a malfunctioning system or piecing together a PC from spare parts.
freedos.org
When you need an operating system for an old PC, try
FreeDOS, a no-cost MS-DOS work-alike. The software fits on a floppy and even includes a graphical user interface. You'll also find setup tips for laptop users and gamers.
linuxiso.org
Need a fresh OS to revitalize a slow PC? Many Linux distributions are optimized for older hardware.
LinuxISO.org delivers a thorough list of Linux distributions via download, with information to help you choose the best one.
oldversion.com
Older PCs often can't run the latest software.
OldVersion.com delivers earlier versions of popular utilities, Internet applications, and multimedia tools. These previous versions may run better on older hardware.
partstore.com
If an obscure or proprietary part breaks on your PC, don't give up on it.
Part Store has hard-to-find cables, power adapters, internal components, and other esoteric parts for thousands of desktops and laptops.
smoothwall.org
Burn the free
SmoothWall Express software to a CD, then boot your older PC from that disc. Within minutes, that computer will have a new life as a difficult-to-crack firewall, protecting the other computers on your LAN.
tinyapps.org
The right software is essential to making old hardware run well.
TinyApps.Org offers links to hundreds of small, fast Windows, Mac OS X, and Palm applications, including text editors, Web browsers, and e-mail clients.