Virtual Domains provides Multi-domain capability for Joomla without changing the Joomla core files. Simply register any number of additional available domains in the components backend and define their properties.

Just Another Component Creator.
JACC creates installable Joomla components, modules, plugins, templates and packages, and is a very good starting point for your new extension or template

Jacc is for developers.

Jimtawl represents a radio station on the web. Show the visitors your programme calendar, programme details, playlists, who is on air. Upload features as mp3, select licenses like creative commons and much more.

Zappa is a CMS for radio stations which supports the stuff from the planning of the programme  to the publication of features on air and on the internet.