This website is based on an open source platform but it is heavily customized in terms of design and functionality. It basically indexes songs and artists using last.fm and streams from YouTube. Anyone can download the script and build their own custom “MusikWave”. Since it pulls music from YouTube probably has the biggest music collection of all music applications, including Spotify.
MusikWeave is a trade-free project/service, except whatever YouTube (google) may collect about users (something we cannot control). Being trade-free means that this project does not want anything from anyone (thus, it is trade-free). We don’t need/want people’s money, their data, attention, to register, or anything of the sort. The registration is required only if users wish to save their music in playlists.