I won’t bother to explain how this is accomplished. Just watch the short video on the site and you’ll see just how slick it is.
The one thing I do wish it could incorporate is to also allow links and images from say Reeder or Safari to be dragged which I find myself doing every so often. A quick email exchange with the developer assured me that the next version would incorporate this… yay!
If you find yourself lost in a sea of full screen apps and spaces, for $2.99 do yourself a favor and give it a go. Recommened!