The Amazon S3 Java toolkit by Amazon aims to simplify interaction with Amazon S3, part of Amazon Web Services. It also works with Amazon CloudFront. This library has been designed to interact with the API, that offers the features of storage, cloud, data backup, and disaster recovery. Available for download. The repository JetS3t for developers is an open source site for Amazon Simple Storage Service (S3).
AWS has launched CloudTrail: a resource tracking and user visibility API. CloudTrail records API calls made to AWS accounts and returns log files. CloudTrail records calls across AWS services. Whether you need to track calls made to the AWS Management Console, AWS SDKs, command line tools, Cloud-Formation, or other AWS services; CloudTrail's call history helps increase security analysis, resource change analysis, and compliance.