WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Dropbox - Online Sync and File Sharing
Mega - Secure File Storage and collaboration
Hightail - The professional way to send & share files and folders with anyone
Google Drive - Access and sync your files anywhere
Filemail - Secure Fast File Transfer & Sharing Service: No-File-Size-Limit, UDP Speed, Compliant With A Range Of Mandates