http://www.uwe-sieber.deprovides tools and drivers like UMBPCI, especially if you want to enhance your DOS configuration. Provides useful information for USB stuff as well.
http://johnson.tmfc.net/freedosprovides an UDMA drivers for DOS as well as a
DOS USB driver disk
VCool RMClockis a tool for Windows
and Linux which enables the power saving mode of the AMD K7 CPU which is disabled on most boards. RMClock also supports P4 and Core CPUs.
www.georgebreese.com/net/softwarehas some valuable tools and hints concerning chipsets and OS configuration.
MWConnis a valuable and compact tool for GPRS/UMTS/EDGE modems with many additional options.
Award BIOS Editor
A program for modifying binary AWARD BIOS files
ROM.by
provides a program for modifying you BIOS as well as a bunch of already patched files. Does a great job in adding support for newer CPUs in old BIOSses as well as fixing harddisk compatibility problems
Wims BIOS page
is a great source for BIOS files and related tips