Last year Spotify opened their platform for developers to write applications that utilize Spotify. Now the first results are popping up:

Clementine Player

Clementine is a multi platform music player for your local files, Grooveshark, Last.fm, SomaFM, Magnatune, Jamendo, SKY.fm  Digitally Imported and Icecast. Now it has added Spotify as well (Premium needed)

You can create playlist using tracks from different services and you local files. Unlike Spotify Clementine also plays FLAC, WMA en more.

SpotON Radio

SpotON brings Spotify Radio to your iPhone. Pick one of your favorite artists, and tap to create unique radio stations similar to their style. Think Pandora. Like and dislike songs to fine tune your station.

Free download at your local iTunes App Store

Soundrop Radio

Probably you know Soundrop already as an App in the Spotify App Finder. Soundrop is a social jukebox app for Spotify. Enter live music rooms and listen to what’s being played, or become the DJ and add tracks or vote up songs to be played next. Now you can use it on your iPhone as well.

Free download at your local iTunes App Store

We haven’t seen Android versions of these Apps yet.