Nice list of available Virtual Appliances...
Don't just be a consumer of Virtual Appliances, but also be a creator of your own Virtual Appliances. Flexera Software LLC offers Virtual Appliance building solution (for Amazon and VMware clouds) with InstallAnywhere 2012 release. With a very minimal configuration, you can get your appliance ready and running in the respective clouds. The solution is available at http://www.flexerasoftware.com/resources/trials.htm#installanywhere
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