Apps with 'Opus codec support' feature
Listen to free music and podcasts on Soundcloud.
fre:ac is a free audio converter and CD ripper with support for various formats and codecs. It will convert between MP3, MP4/M4A,...
Poweramp is the new powerful music player for Android.- plays mp3/mp4/m4a(including lossless alac)/flac/ogg/wav/tta/ wma/ape/wv
cmus is a small, fast and powerful console music player for Linux and *BSD.Input/Output Plugins
WACUP is an independent project to provide new features & bug fixes for Winamp.