Bluemindo is a really simple yet powerful audio player in Python/PyGTK, using Gstreamer. It’s a free (as in freedom) software, released under GPLv3, only.
Bluemindo’s user interface consists of a main view of all your digitized album discs, which is searchable and filterable. The playback mode is gapless and support ReplayGain (it can also automatically choose to switch between Album and Track modes, depending on the kind of music that’s being played). Last but not least, it brings playlist (automatic and user-made), MPRIS/MediaPlayer2 support and lyrics/artwork downloading.
ANMP aims to be a versatile but lightweight audio player, just as the other hundred thousands out there. It is written in C++11. As being only a frontend, ANMP itself doesn’t know anything about audio formats and how to decode them. That’s why it uses 3rd party libraries to decode them. By using VgmStream, GameMusicEmu, LazyUSF and supporting looped songs natively, ANMP is esp. suited to play various audio formats from video games. Moreover it supports Looped Midi Tracks.
muting multichannel audio files
gapless playback (for most streamed audio formats)
arbitrary (forward) looping of songs (i.e. even nested loops)