radio4000
Radio4000 is open to everyone, no special skills or knowledge required
Create and manage your music selection in your radio
Quickly add music to your radio, directly from YouTube videos
Organize your music with #hashtags, dig deeper to understand your discoveries
Play custom selections of music in any radio (anyone can suggest their favorite selections)
Share and embed every radio, anywhere online
AlternativeTo <-- stealing the descriptions from this as for now (placeholder)
AlternativeTo is described as 'The ultimate hub for discovering new and exciting software, no matter what platform you're on! Whether you're looking for apps for Windows, Mac, Linux, online services or mobile devices, we've got you covered!' and is a leading App Discovery service in the education & reference category. There are more than 100 alternatives to AlternativeTo, not only websites but also apps for a variety of platforms, including Mac, Windows, Linux and Google Chrome apps.
muffon
muffon is described as 'Cross-platform music streaming client for desktop, which helps you listen to, discover and organize music in an advanced way' and is a Music Discovery service in the audio & music category. There are more than 50 alternatives to muffon for a variety of platforms, including Android, Web-based, Windows, Mac and iPhone apps. The best muffon alternative is Spotify, which is free. Other great apps like muffon are NewPipe, YouTube, Last.fm and FreeTube.
muffon alternatives are mainly Music Streaming Services but may also be Audio Players or Music Discovery Services. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of muffon.