Potamus is described as 'lightweight GTK-based audio player with a simple interface and an emphasis on high audio quality' and is an app in the Audio & Music category. There are more than 50 alternatives to Potamus for a variety of platforms, including Windows, Linux, Mac, Android and BSD. The best alternative is VLC Media Player, which is both free and Open Source. Other great apps like Potamus are foobar2000 (Free), AIMP (Free), Clementine (Free, Open Source) and Strawberry (Free, Open Source).
VLC is a free and open source cross-platform multimedia player and framework that plays most multimedia files as well as DVDs, Audio CDs, VCDs, and various streaming protocols. Features Simple, fast and powerful media player.
foobar2000 is an advanced freeware audio player for the Windows platform. Main features Supported audio formats: MP3, MP4, AAC, CD Audio, WMA, Vorbis, Opus, FLAC, WavPack, WAV, AIFF, Musepack, Speex, AU, SND... and more with additional components.
Freeware Winamp-like media player, based on BASS audio library with support for large number of formats and playlists. It works with multiple playlists immediately (tabbed window), allows creation of bookmarks and also has a playback queue.
Strawberry is a music player and music collection organizer. It is a fork of Clementine released in 2018 aimed at music collectors and audiophiles. The name is inspired by the band Strawbs. It's written in C++ using the Qt framework.
Quod Libet is a Gapless GTK+-based audio player written in Python. Its designed around the idea that you know how to organize your music better than we do. It lets you make playlists based on regular expressions (dont worry, regular searches work too).
DeaDBeeF is a lightweight graphical music player created for easy playback of music and management of playlists. It supports major audio codecs and tags, global hotkeys, gapless playback, streaming audio, command line control, and has an 18-band equalizer.
Amarok is a powerful music player for Linux, Unix and Windows with an intuitive interface. It makes playing the music you love and discovering new music easier than ever before - and it looks good doing it!