Post your custom plugins for apps here. You can also join the awn-plugins project at http://code.google.com/p/awn-plugins, you will need a google account (its easy to setup).If you want to write plugins yourself, here's an incomplete tutorial demonstrating the Dbus interface.

Music Players

Amarok Script
Amarok Script (little variation)
Banshee Plugin
Deluge Plugin
Evolution Plugin
Exaile Plugin
Firefox Downloads Plugin
Gaim Plugin
Gajim Patch
KTorrent Plugin
Liferea Plugin
Listen Plugin
Pidgin Plugin
Quodlibet Plugin
Rhythmbox Plugin
Thunderbird extension
Xchat Plugin

Writing Plugins