Links
Padi
http://www.padi.com/scuba/
The Professional Association of Diving Instructors (PADI) is the largest, non-school based certifier of recreational divers globally. That means that all PADI Instructors are Independents, and not bound to align themselves with an auditing training facility like Happy Divers Den.
Having said that, most PADI Instructors find it advantageous to link to an authorized training facility like Happy Divers, where they can take advantage of team teaching techniques, Instructor support services and mentorship.
PADI offers some terrific courses, and Happy Divers Den offers a blend of superior courses to make you a safer, more comfortable diver.
Medic First Aid International
http://www.firstaidtraining.com/
Almost everybody out there offers First Aid training of some type or another, but how many are authorized by Ontario's WSIB as workplace approved?
Kill two birds with one stone and not only train in First Aid, but meet your workplace standards at the same time.
Divers Alert Network
http://www.diversalertnetwork.org/
Diving while away?
Divers Alert Network (DAN) insurance is a must have. They not only cover you for missed flights due to medical emergencies when travelling, but they take care of your children while you're sick, co-ordinate evac. and medical care, and cover your medical bills, just to mention a few advantages of membership.
If you dive and don't have DAN membership, you need to visit their site!