Drivers for different hardware
http://www.driverguide.com/
http://www.totallydrivers.com/
http://www.mrdriver.com/
http://www.driverzone.com/
http://www.drivershq.com/
http://www.modem-drivers.com/
http://www.fcc.gov/oet/fccid/

video drivers:
http://www.3dchipset.com
http://www.guru3d.com/
http://www.nvidia.com (nvidia based cards only)
http://mirror.ati.com/support/drivers/powered.html (ATI cards only)

General Drivers:
http://www.pcdrivers.com/alpha.htm
http://download.com.com/2001-2014-0.html?legacy=cnet

Firmware for CD/CDRW/DVD drives:
WARNING: FIRMWARE IS THE CORE SOFTWARE COMPONENT OF HARDWARE DEVICES AND IS HELD MOST OFTEN IN A FLASHABLE RAM MODULE. IF YOU CHOOSE TO UPDATE YOUR FIRMWARE ON ANY DEVICE, YOU DO SO AT YOUR OWN RISK. A FAILED UPDATE CAN CAUSE YOUR DEVICE TO STOP WORKING COMPLETELY.


If you have sites that you would like to add here, send me a PM and I'll add them.