Dropbox - Online Sync and File Sharing

WeTransfer - WeTransfer is a free service to send big or small files from A to B.

ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.

Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.

Hightail - The professional way to send & share files and folders with anyone

FileRun - Beautiful, fast and reliable selfhosted file sharing and sync.