overGrive - Complete Google Drive desktop client for Linux
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Syncdocs - Syncdocs syncs folders between all your PCs and Google Docs.
FileCloud - FileCloud is an enterprise file share, sync and mobile access solution.
drive-cli - Google Drive client for the commandline
S3 Browser - S3 Browser is the name of an easy and simple to use Amazon S3 clients for the Windows operating systems.