This is a Java-based command line utility which provides functionality around S3 buckets with versioning enabled -- something which normal S3 browsers as of yet don't support.
If you host your data in the Amazon cloud (AWS) and you use versioning on your S3 bucket(s) you would have noticed the lack of support (currently) from Amazon on this. This tool aims to provide some help with that.
Have a look at the usage page here: http://awsversionmgmt.sourceforge.net/usage.html for examples on how...