instashare - Share your photos to instagram from your mac
FileRoom.io - Browser airdrop to send files to anyone, on any device
Frame.io Watch Folders - Accelerated, secure, & indestructible uploading to Frame.io
Plover - Browser Airdrop - transfer files to anyone, any device
Droplr - Droplr is a tiny application that aims at helping people share things easier.
Pushbullet - Pushbullet - Your devices working better together