Swiftdrop VS Dockdrop

Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.

Shelfit - Worry less about juggling multiple windows or deciding where you want to store things. With Shelfit you can quickly open up a shelf, drag files in, and then when you're ready just drag them back out.

KShare - The free and open source and cross platform screen sharing software

Yoink - Yoink is a website that makes it easier to drag and drop images and text from one screen to another. It's a straightforward site with help along the way if you aren't sure about dragging and how to place your content.

FileTransfer.io - Send your files safely up to 6GB for free. No download speed limit. No registration needed.

Droplr - Droplr is a tiny application that aims at helping people share things easier.