WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Dropbox - Online Sync and File Sharing
Streamfile - Exchanging documents over moment envoy are normally more miss than hit, and email limits you to 25MB at most—in case you’re both on Gmail.
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
Files2U - Files2U is free to use web service that permits you to share documents on the web.
Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...