We have been discussing on the gambas mailing list about expanding the Farm to include modules/classes/components/controls/etc as well as whole gambas applications (Benoit included).
Benoit has a million things to do though so it may take a while but something is happening towards gambas having it's own list of community based custom things
This forum has a Component Showcase section but there is currently not a lot on it: viewforum.php?f=17