jakajancar/DropboxUploader
Dropbox Forms: Receive files from your web site to your dropbox!
Automate backup transfers for Dropbox, FTP, SFTP, Amazon, MySQL, and lots more | Backup Box
BusyFlow
Filepicker.io | File Upload Plugin for Web and Mobile
Boxopus - Site
Meetin.gs - Free, Easy and Better Online Meeting Organizer