This music player is supposed to be simple and all centered around an infinite intelligent queue (some other players call this PartyShuffle or DJ mode). You can manually add songs to it - but if you don't or the queue gets too short, it will automatically intelligently fill it with further songs.
The intelligent queue decision currently is based on:
* song ratings
* context-based choices, e.g. related songs more likely
Other features of this player:
* open source, simplified BSD license
* simple
* support of most important sound formats. just uses FFmpeg
* music database (optional)
* audio volume normalization. own ReplayGain implementation
* gapless playback
* Last.fm scrobbling
* AcoustID fingerprint
* imports iTunes song ratings