This is a workflow that you won’t use often, but when you do need it, it will solve a common Finder annoyance.
Ever right-click a file, choose Open With… and Finder presents all the applications that can open that file, only many of them are duplicates (see image below)? Activate this workflow with rdcmi, wait a few seconds and all those duplicate entries are removed.
Find more information here.
Download the workflow here.
I keep my small collection (more coming) of Workflows/Extensions here.