Saxon Math Publishers
Home School Legal Defense Association
Join this organization for a nominal amount per year and you get to call them if anyone bothers you about home schooling your children. This is worth it just for the peace of mind.
Regional Associations - Local Homeschool Groups
The publishers of Practical Homeschooling. "the best homeschooling site on the web - contains articles, lists of homeschooling organizations and conventions, Homeschool Mall, Help back issues, and much more!"
The Writing Course
The Writing Course, designed by a RC family, helps parents give the feedback needed to cultivate excellence in grammar, punctuation, style, etc.
Read Write Play Music
A homeschool music course that follows the RC type of methodology for music. By Dr. Ian Hodge and his talented family.
The Homeschool STUDENT Planner
My wife loves this homeschool planner by an RC family. Our kids like it too.