Dropbox - Online Sync and File Sharing
Gotty - GoTTY is a simple command line tool that turns your CLI tools into web applications.
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
tmate - Tmate is a instant terminal sharing based on ssh.
WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Pagekite - Bring your localhost servers on-line.