Here is a list of all topics with brief descriptions:

Freedesktop Standards utilitys	Micro implementations of Freedesktop.org standards for .desktop files, icon themeing and vfolders
MBFont - Simple font abstraction and rendering tools	Mbpixbuf contains simple image manipulation and composition functions for client side images
MBMenu - A simple popup menu widget	Simple independent popup menu widget, used mainly for application launchers etc
MBPixbuf - Simple image manipulation tools	Mbpixbuf contains simple image manipulation and composition functions for client side images
MBTray - System tray applet toolkit	A simple toolkit for creating xlib based tray ( aka panel ) 'applets'
Various Utility functions	Misc useful functions used by various parts of matchbox