Dropbox - Online Sync and File Sharing
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.
Syncthing - Syncthing replaces proprietary sync and cloud services with something open, trustworthy and...
XShare - XShare – File Fast Transfer developed and published by Shalltry Groups.
ownCloud - ownCloud is an open source project enabling businesses to host their own cloud storage while maintaining regulatory and compliance needs.
Send Anywhere - Send whatever you want, wherever you want