Backup, freeware

1. DriverMax
(For Windows XP and Vista only)
View, backup, restore drivers to a folder or a compressed file. After reinstalling Windows you will have everything in one place!
http://www.innovative-sol.com/drivermax/index.htm
2. Double Driver
View, backup, restore drivers. Save and print drivers list.
Last program update in 2004 :((
http://boozet.xepher.net/dd/index.htm
3. Driver Magician Lite
View, backup, restore
http://www.drivermagician.com/Lite.htm
4. WinDriverExpert
Only view and backup
http://www.zhangduo.com/WinDriverExpert.zip
5. Driver Collector
Backup
http://www.softpedia.com/get/System/OS-Enhancements/Driver-Collector.shtml

Note!
Not all programs catch all of the drivers. Test it!