Onionshare - OnionShare lets you securely and anonymously share a file of any size with someone.
ShareDrop - HTML5 clone of Apple's AirDrop - easy P2P file transfer powered by WebRTC
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.
Send Anywhere - Send whatever you want, wherever you want
Warpinator - Share files across the LAN. Contribute to linuxmint/warpinator development by creating an account on GitHub.
Wormhole.app - Wormhole lets you share files with end-to-end encryption and a link that automatically expires.