Dropbox - Online Sync and File Sharing
XShare - XShare – File Fast Transfer developed and published by Shalltry Groups.
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
Zapya - Zaypa is a cross-platform transferring and sharing!
Google Drive - Access and sync your files anywhere
Send Anywhere - Send whatever you want, wherever you want