Before the Architect offer a range of educational resources and consultation & design services to prospective homebuilders, including introductory tutorials for particular architectural styles, including an excellent short description/introduction to the Craftsman style. As the site notes,

You've come to the right place if:
1. You want to be involved actively in the plans for your next house or major addition.
2. You have been-there, done-that with architects, and prefer not to go back-there and do-it-again.
3. Your dream home is your next home.
4. You have planned, clipped, and sketched for years, and now it's time to sort it out and get going.