Amazon Web Services (AWS) is something like the world's biggest shopping mall of cloud-based services. It boasts not only a wide range of service offerings, but a sizeable ecology of freeware libraries and tools for accessing them. While AWS's chief language of use is Java, you'll find tools for Python, JavaScript, Perl, Ruby, C#, and more. Finally, Amazon's micro-pricing architecture makes it possible for even the most cash-strapped developer to test the viability of a cloud-based application.
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