Ok, the wizards that come bundled, and free, are user written unsupported wizards. It is a bit confusing that Brian Barker was listed as author, but those were done while he was still just a mach user working at U Maine.
The Newfangled Suite was written by Brian and he sold them for $50 using the company name Newfangled. These wizards run as VB scripts and screen sets under mach3. They are included in the mach3 installer, and will run in demo mode without a license. You can run them and see how they work, but they wont save the gcode unless you have the license.
The Mill Wizards is a new package, aimed at the new Mach4. They are written in c++ and are fully standalone programs. They can run on any PC without mach. They have a demo mode that wont save gcode.
Both of the paid set of wizards let you build up a full part by doing individual operations. In your motor mount part you could run the slot operation 4 times, positioning each slot at the correct location, then get out one gode file that was the entire part. The free wizards are each independent programs, they will generate the code for one operation, like a slot, but you then have to save that and do the next step as a complete new job.
So, does that help to understand the world of wizards?