overGrive - Complete Google Drive desktop client for Linux
GMX File Storage - The GMX File Storage Manager allows your PC and your GMX File Storage to exchange data via the...
Syncdocs - Syncdocs syncs folders between all your PCs and Google Docs.
Sync.com - Sync. com offers a backup tool and a file sharing service, rolled into one.
drive-cli - Google Drive client for the commandline
Yandex.Disk - Files on Yandex.Disk won't get lost if your phone or computer breaks.