forscan coding scan tool

We need a Forscan bravery thread :) FORScan Crowdsourced Wiki

I've read a lot of forum posts about using a FORScan tool to modify settings. This is new to me and I'm curious what tool you use, and if there are any major differences between these tools, and what they can do? Can y'all help a fellow Ranger out and maybe post some links to what you purchased...