If you tire to use the free for one year EC2 Instance t1.micro and need more oomph then:<br><br>Amazon EC2 recently launched an instance type that offers:<br><ul><li>Two Intel E5-2670 processors running at 2.6 GHz with Intel Turbo Boost and NUMA support (16 cores). <br>
</li><li>244 GiB of RAM. <br></li><li>Two 120 GB SSD for instance storage. <br></li><li>10 Gigabit networking with support for Cluster Placement Groups. <br></li><li>HVM virtualization only.</li><li>EBS backed</li></ul>So if you have one of those problems that require lots of ram and lots of  i/o (disk and network). Then this is the box for you.. <br>
Total cost is ~ 3.5 USD/hour<br><br>See <a href="http://aws.typepad.com/aws/2013/01/ec2-for-in-memory-computing-the-high-memory-cluster-eight-extra-large.html">http://aws.typepad.com/aws/2013/01/ec2-for-in-memory-computing-the-high-memory-cluster-eight-extra-large.html</a><br>
<a href="http://aws.amazon.com/free/">http://aws.amazon.com/free/</a><br><br>If you are into distributed programming, have a look at SWF<br><a href="http://aws.amazon.com/swf">http://aws.amazon.com/swf</a><br><br><br><br>