Switcheroo
Title: Switcheroo
Description: Quickly switch two file's names with a drag&drop GUI.
Version: 1.0.2 (2009-07-16) -- Full changelog
Download: 
Portable zip
Discussion forum: Here
Features:
There are two drag & drop methods available:
1. Drag & drop one file on to each of the edit fields.
2. Drag & drop two files anywhere on the form.
Screenshot:
