Introducing our (admitedly late) entry for Music Hackday - Amsterdam... toma.hk. Toma.hk is an easy way to share links to songs that work for virtually everyone, not just people that use the same music service that you do. Instead of sharing a link to a specific instance of a song that your friends may, or may not, have access (or rights) to - you instead share a toma.hk link that lets the person following the link to decide where the song is fulfilled from.
When you land on a toma.hk song page it will attempt to resolve the song against a wide range of content resolvers (the same resolvers used internally by Tomahawk). If you have Tomahawk installed, when you click the play button it will add the song to your Queue and play it once your currently playing song is done.
If you don't have Tomahawk installed, then it will resolve to the next best source and try to play it back directly in-page (or for Spotify tracks will launch Spotify).
You will always know what to expect by noting the service icon that is displayed on the artist/album image. If you'd prefer one of the secondary sources then just click the link for icon for that source.

There are a few ways you can create and share toma.hk song links:
1. Go to toma.hk and just type enter an artist name and song title
2. Right-click on any song in Tomahawk, "Copy Track Link" and share