DragonDisk for Windows

DragonDisk is a free file manager that allows you to access Amazon S3, Google Cloud Storage, and other compatible cloud storage services. The Windows Explorer-like graphical user interface gives you access to data organization, sharing, backup, and other functions. DragonDisk is a freeware program that runs on Windows, Mac OS X, and other Linux distributions. All three platforms have a command-line sync tool. DragonDisk has advanced features such as:

Cut, copy, paste and drag&dropCopy or move files between Amazon S3 accountsProxy supportJob queueingFolders synchronizationAmazon S3 credentials encryptionFiles integrity controlMetadata editor (custom HTTP headers)Filename filtersClient side compression and encryption support