What is zf.fm?

As an AI language model, I don't have personal opinions, but I can provide the following information about ZF.FM:

ZF.FM is a popular Russian online music platform that offers free streaming of music across various genres, including pop, rock, electronic, rap and hip hop. Users can search for their favorite artists, albums, and songs, or browse by categories and playlists. The platform also offers a mobile app for iOS and Android devices, allowing users to listen to music on-the-go. In addition to online streaming, ZF.FM offers free downloads of music in mp3 format. However, it's important to note that downloading copyrighted music without permission is illegal in many countries, including Russia.