Air Live Drive supports the most important clouds, you can add all you want and transfer files and folders between them. For example, if you want to copy/paste files between Box and Google Drive, wiht Air Live Drive is very easy.
First of all you have to install the software. You can download Air Live Drive here:
Then, you have to add your Google Drive and Box accounts and conect them.
Then, open your accounts in the Windows Explorer and copy/paste between clouds.
In the Log window you can check the logs and monitor the process.