LocalSend - An open source cross-platform alternative to AirDrop
PairDrop - Local file sharing in your browser. Inspired by Apple's AirDrop. Fork of Snapdrop.
ShareDrop - HTML5 clone of Apple's AirDrop - easy P2P file transfer powered by WebRTC
Snapdrop - An open source alternative to Alternative to AirDrop.
Send - Instant messaging meets email (by Microsoft)
Send Anywhere - Send whatever you want, wherever you want