- RBAutoPlaylistSource — automatic playlist source, based on a database query
- RBBrowserSource — base class for sources that include genre/artist/album browsers
- RBDisplayPage — base class for items that appear in the display page tree
- RBDisplayPageGroup — Display page grouping
- RBDisplayPageModel — models backing the display page tree
- RBDisplayPageTree — widget displaying the tree of RBDisplayPage instances
- RBImportErrorsSource — source for displaying import errors
- RBLibrarySource — main library source, containing all local songs
- RBMissingFilesSource — source displaying files missing from the library
- RBMediaPlayerSource
- RBPlayQueueSource — source object for the play queue
- RBPlaylistSource — Base class for playlist sources
- RBSource — base class for sources
- RBStaticPlaylistSource — Manually defined playlist class
- RBStreamingSource — Base class for streaming sources such as internet radio
- RBDeviceSource — interface for sources based on physical devices
- RBTransferTarget — interface for sources that can receive track transfers