DragQueen is described as 'Dropzone for dragging and dropping files and text clippings' and is an app in the Office & Productivity category. There are five alternatives to DragQueen for Mac, iPhone and iPad. The best alternative is Unclutter. It's not free, so if you're looking for a free alternative, you could try Liszt. Other great apps like DragQueen are Dropzone (Paid), Yoink (Paid) and Dropover (Paid).
Unclutter is a new handy place on your desktop for storing notes, files and pasteboard clips. To open your pocket, simply move the pointer to the top of screen and scroll down. Drag items from other applications to the top of screen to store them in Unclutter.
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.
Liszt is a simple that lives in your menu bar. When you drop an image on it, it uploads the image to your FTP server. The link to the image is copied to your pasteboard as a Markdown image tag. This saves you a lot of hassle when adding images.