Compscore2 has most standard Mitchell movements build it. Howell and other one-winner movements, Team movements, and specialised Mitchells, are all managed using templates.
Templates are simply CSV files in a specific format. You can create them with Excel, or use Compscore2's in-built template creation process.
There is a built-in option in Compscore2 to refresh all your templates automatiaclly based on the latest templates on this web site (internet connection required). This is located under Setup | Movement Templates | Download Templates. Otherwise you can download them individually from the list below (click and choose Save As).
New WBF Continuous VP Scales
(PDFs, 3-up, for distribution - see example)