Two good sites to check out:
Equus.net
From the website:
Equus.net presents JP Giacomini's Essential Horsemanship training method as an approach to horse education based on increasing the relaxation of the horse and the authority of the rider, building an ideal horse-human relationship.

Equus.net also presents the Lusitano breeding stallions of the Baroque Collection, as well as other Baroque breeds, such as the Marwari, the war horse of ancient India.

The Show Planner
Lots of informative/authoritative articles with great links and resources for the professional or amature.