NEOLiNES

Link Spotify tracks to your posts and pages using uri-based shortcodes.
Ex. 
[spotify:track:2lBpN5CZ3zLyVIPejUhN6Y]
Attention! 
At this moment you can NOT link albums, playlists or artists, just tracks.

WP-Spotify

Link Spotify tracks to your posts and pages. Including widget.

melihbey

This plugin will create a perfect skin in your wordpress blog. 
Adds a image and song in your template.
<h3>License</h3>
This plugin it’s released under the GPLv2, you can use it free of charge on your personal or commercial website.

Happy New Year

This plugin will create a good skin in your wordpress blog.

WP-Spotify vs Happy New Year