The CvsGui project is providing several high-end interface clients (WinCvs, MacCvs, gCvs) written in C++ using popular frameworks (MFC, PowerPlant, GTK+) with a scripting support via Python or TCL.
The Stakker project aims to develop Linux drivers and GUI CD management applications with a SQL backend for CD/DVD library/archiving boxes. The Dutch word "Stakker" means "poor blighter" (says babelfish) :-). Imation Stakka works, CD-300 not yet.