NearDrop - An unofficial Google Nearby Share app for macOS
Send Anywhere - Send whatever you want, wherever you want
Snapdrop - An open source alternative to Alternative to AirDrop.
ShareDrop - HTML5 clone of Apple's AirDrop - easy P2P file transfer powered by WebRTC
Sharik - Sharik is an open-source, cross-platform solution for sharing files via Wi-Fi or Mobile Hotspot
Arc File Sharing by Quadren - Arc is a seamless, secure and cross-platform local network file sharing service by Quadren.