Plupload - Multiple file upload utility using Flash, Silverlight, Google Gears, HTML5 or BrowserPlus!
BoxCryptor - Boxcryptor encrypts your sensitive files before uploading them to cloud storage services like Dropbox, Google Drive, Microsoft OneDrive, Box, and many others.
FancyUpload - digitarald:Harald K - Consultant & Contractor - FancyUpload - Swiff meets Ajax - Swiff meets Ajax for powerful and elegant uploads.
Mega - Secure File Storage and collaboration
Fine Uploader - Javascript plugin tool to give your users a smooth experience when uploading files to your website.
Google Drive - Access and sync your files anywhere