Google Storage is one of the newest and most promising entrants into the cloud storage market. Its integration with other Google services such as Google App Engine makes it a viable threat to the current leader, Amazon S3. The service is currently in closed beta, but if you're lucky enough to snag an invite, you'll probably want a more advanced manager than Google's bare-bones Web app, which supports little more than bucket creating and file uploading. For accessing advanced features of Google Storage such as setting HTTP headers or access control levels (ACLs), Google offers the command line utility GSUtil. But unless you're a console guru, a graphical manager such as CloudBerry Explorer for Google Storage is highly preferable.