The gconf command allows to store configuration information in a Gnome complient way. It is available as separate library gnoclGconf.
The separate library gnoclVFS allows to retrieve MIME information and implements commands to use the Gnome virtual file system.
Syntax and semantic of these commands is not yet stable. Please mail the author if you have suggestions for improvements.
The separate library gnoclGnome implements different Gnome specific widgets and commands.