PlaneUpload (planeupload.com) is a FREE web based widget that you can easily install on your web application.
– Files stored in your cloud: Dropbox, Google Drive, Amazon S3 or (S)FTP server
– Easy to install: just copy / paste the code
– Customizable: change colors and add your CSS code
– Secure: all files are stored in your clouds
– Backups: easy to set second cloud, where all files are copied to
– API Access: Full access to your files via server-side API
– Compression: click “Download as zip” to download compressed file or set up auto compression for all files to use less traffic and storage
– Logs: all file actions are logged
– Comments: you can add comments to any file
– Miniatures: thumbnails for hundreds of file types