DragonDisk is very powerful file manager for Amazon s3 services, Google cloud storage, and all cloud storage services that provides compatibility with Amazon s3 API. It is a freeware and a cross-platformed application. You can use it on Windows, Mac OS X and Linux. Its capacities and convenience will induce you from the begin, whether you are a beginner or an expert client.

Features

* Cut, copy, paste and drag&drop
* Copy or move files between Amazon S3 accounts
* Proxy support
* Job queueing
* Folders synchronization
* Amazon S3 credentials encryption
* Files integrity control
* Metadata editor (custom HTTP headers)
* Filename filters
* Client side compression and encryption support

Ubuntu 12.04 and later require an old version of libssl to be installed 

sudo apt-get install libssl0.9.8

Ubuntu 32-bit 

Download the deb package and install

wget http://download.dragondisk.com/dragondisk_1.0.5-0ubuntu_i386.deb

sudo apt-get install libqt4-dbus libqt4-network libqt4-xml libqtcore4 libqtgui4

sudo dpkg -i dragondisk_1.0.5-0ubuntu_i386.deb

Ubuntu  64-bit 

wget http://download.dragondisk.com/dragondisk_1.0.5-0ubuntu_amd64.deb

sudo apt-get install libqt4-dbus libqt4-network libqt4-xml libqtcore4 libqtgui4

sudo dpkg -i dragondisk_1.0.5-0ubuntu_amd64.deb