WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
Mega - Secure File Storage and collaboration
e2ee cloud - e2ee-cloud is a open source, self-hosted, end-to-end encryption software.
4Shared - 4shared is a perfect place to store your pictures, documents, videos and files, so you can share them with friends, family, and the world. Claim your free 15GB now!
4sync - A wonderful application that links all of your computers and mobile devices together. Easiest way to back up and sync your files online. Cross platform file management in the cloud