Xonar Front Panel Switch (new version) aka fpswitch is a tool that allows seamlessly changes between rear speakers and front panel speakers output.
Page dedicated for Xonar hardware mods discussions. Includes list of tutorials.
Xonar Driver Restart is an application that will restart the Windows Audio Service and C-media audio driver.
A tool that cleans any remaining Xonar driver files and settings.
UNi Xonar drivers frequently asked questions and troubleshooting guide.