Fitness
ACTION Certification - http://actioncertification.org/
Offers free personal trainer certification as well as other resources such as business plans, help videos and insurance.
National Association for Fitness Certification - http://www.nafctrainer.com
Offers a number of certification programs covering wellness, pilates coaching and nutrition.
Nia London - http://www.nialondon.com/
Provides information on the fitness technique and how to practice it in London, UK.