This readme shows the "important stuff", which is the stuff you're probably looking for.

• Generating keys or confirmation IDs? You'll need UMSKT.
• Programmatically managing keys or confirmation IDs? You'll need xpmgr.
• Interested in how activation works? Visit the writeup repository.
• Need the right parameters to make keys? Go to the PIDDatabase Viewer (or see it's source code).

All other repositories are more or less for development purposes, rather than a usable product.