Yoink simplifies drag and drop between windows, apps, spaces and fullscreen apps.
When you start dragging a file in Finder or content from an application, Yoink fades in a tiny window at the edge of your screen so you can drag to it.
This frees up your mouse so you can comfortably navigate to the destination of the drop and resume the drag from Yoink's window.
Mac OS X 10.9,
Mac OS X 10.10,
Mac OS X 10.8,
Mac OS X 10.7