Shoo for Mac

From Christopher Derr:

Shoo allows you to assign up to three different applications to launch each file type. A command-drag in the finder will launch the document in the pre-selected application.

Example: Set up Shoo to open a JPG document in Photoshop when the document is command-dragged to the right. Open the same JPG document in Safari when the document is command-dragged toward the bottom of the screen.