**Grooveshark**  (*<a href="http://grooveshark.com">www.grooveshark.com</a>*)

Online Music streaming, music recommendation and sharing

<br/>
**Restrictions** 

 - It is flash based (if that is a restriction)
 - Mobile apps are available only for paying customers.

<br/>
**Pros**
<ul><li>Great UI </li>
<li> Large collection of songs, ability to create, save and share playlists</li>
<li> A good song recommendation engine</li>
<li> Radio </li>
<li> Internationally available</li>
<li> Free </li>

</ul>

<br/>
**Cons**
<ul><li>Non-paying customers can't use mobile apps</li></ul>