I am the creator of Cloud Explorer v3.1. This is a portable application that works on any operating system running Java.
Description of the program:
This is a simple, free, and open-source S3 client made by me. It works on Windows, Linux, and Mac. Cloud Explorer provides extras that are not found elsewhere in other S3 browsers like search for objects, music player, transition to Amazon Glacier, Amazon RRS, migrate buckets between S3 accounts, compress files piror to upload,take screen shots to S3, simple text editor, and image viewer. Users can easily sync folders to their S3 account and upload and download files to their computer.
It is also featured on Softpedia:
I think this would make a good addition to the portable apps suite to manage Amazon S3 storage.