Send Anywhere - Send whatever you want, wherever you want
Dropbox - Online Sync and File Sharing
AirDroid - Access Android phone/tablet from computer remotely and securely. Manage SMS, files, photos and videos, WhatsApp, Line, WeChat and more on computer.
Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.
WeTransfer - WeTransfer is a free service to send big or small files from A to B.
SHAREit - SHAREit allows you to transfer files and data from your phone to another device without having to rely on WiFi or a data plan.