There are several. NAUI is set up as a 503 NGO. YMCA, which was also a CMAS linked group, got out of diving education and they passed the CMAS flag to SEI and USOA, the Underwater Society of America. And please don’t forget our friends at the British Sub Aqua Club. They are unique. They have two branches or two groups, one is the retail, business style, BSAC, but they other, is a "club" style, and thus the name, "The British Sub Aqua Club." The club branch is pure non-profit. NAUI is awesome, CMAS is still alive and kicking, and there are CMAS instructors in the USA, and someday, you might even see the BSAC in the USA someday. There are, however, those in the diving community who do not want to see the BSAC open its doors in the USA. I am a yank, I have dived with them, and with the chaps I have dived with they were fantastic divers.