Amazon Simple Storage Service (Amazon S3) is a cloud object storage service provided by Amazon Web Services. As Amazon S3 does not have a minimum fee, we just pay for what we store. We can store and get any amount of data, known as objects, in S3 buckets in different geographical regions through API or several SDKs. AWS SDKs provide programmatic access, for example, multiply uploading objects, versioning objects, configuring object access lists, and so on.
Amazon Web Services provides the following SDKs at http://aws.amazon.com/developers/getting-started/:
AWS SDK for Android
AWS SDK for JavaScript (Browser)
AWS SDK for iOS
AWS SDK for Java
AWS SDK for .NET
AWS SDK for Node.js
AWS SDK for PHP
AWS SDK for Python
AWS SDK for Ruby