Are SOFA and NSFE legitmate, reputable organizations?

I received in the mail a flyer offering a free 6 hour course at a local college. The course is titled “The Changing World of Retirement Planning.” The flyer state “Many of the retirement strategies utilized by your parents have grown outdated…” They claim to cover topics like tax rate risk, retirement distribution planning, estate planning, maximizing social security, mitigating market loss, long-term care planning, and some others. The course is sponsored by SOFA (The Society For Financial Awareness) and you register through NSFE.org. I haven’t heard of either and last I checked, nothing in life is free. Have you heard of these organizations and are they legitimate? Thanks!