WFMU.FM is a unique example of community radio. Their approach is carrying over into the development of an open source CMS, or Content Management System, for radio operations on the web.
Dubbed Audience Engine, Nieman Journalism Lab reports that WFMU has been developing their own CMS since 1998 and, though it looks outdated, they're raising about 70 percent of WFMU’s annual $2 million budget...through its website."
So there's apparently a robust feature set but the software is proprietary and the developer wants to keep it that way.
Audience Engine will employ modular APIs so that other stations can choose which features they desire. FMU is also planning to launch a for-profit subsidiary offering training and other paid services which are often a revenue source for open source software developers.
See Nieman Journalism Lab for more details and the thinking behind this move.