Gdrive.net!

odrive is a free application that makes it easy to manage, access, and share all of your files from one place. Integration into more than 20 services, full bi-directional desktop sync, placeholder files, a robust web client, and advanced sharing capabilities.

Google Drive plugin for Total Commander , can be used to manage files on multiple Google Drive accounts simultaneously. Single sign-on is required for each Google Drive account, after which you can access files as if it is a local drives.

LaciCloud is a free, open source FTP-based cloud storage. It is compatible with every device and always under developement.

jdrivesync is a simple command line tool that synchronizes a local file system structure to your Google Drive (and back).

overGrive is a complete Google Drive desktop client solution for Linux - Auto Sync Google Drive to your computer- Auto Sync Local Files to Google Drive - Select Google Drive Folder - Select Google Drive Folders to Sync - Convert Google Docs to Office File Formats for offline editing - Convert Office Files back to Google Docs formats - Sync Multiple Accounts

CubeBox is an enterprise e-Archive and Document Management System. It has the ability to search for unique content. You can search the contents without opening the files. At this point you gain speed and save time. It also offers the option to sync with Dropbox and Google Drive.

GDocsDrive is a powerful desktop client tool for Google Docs, which makes Google Docs truly become a Google Drive (GDrive) on your desktop by enabling you to upload your files and folders with just a single drag and drop. With GDocsDrive, you can transfer thousands of files or folders to Google Docs in the background without keep any windows or webpages open. As a desktop app, GDocsDrive can let you do almost anything you can do with Google Docs, from the comfort of your desktop.