(page updated July 10, 2011)
PearGUI is a front-end for PearPC. The final version is located over here.
PearGUI is sort of obsolete. It is recommended to use a more recent alternative instead.
Additionally, our PearPC setup guide includes a version of PearPC Control Panel modified to be used with the “redscorp” builds of the emulator from 2007 and 2008.