Ning allows you to build a basic site for free or customize it (turning off advertising and other features) for a nominal monthly fee.
Manny Hernandez and Ning
In 2007, an enterprising guy named Manny Hernandez launched TuDiabetes.org on the Ning platform to provide a way for diabetics to connect with peers. (Hernandez was diagnosed with diabetes in 2002.) In 2008, he founded and currently leads the Diabetes Hands Foundation — the nonprofit behind the community. Today, TuDiabetes.org (aka TuDiabetes.com) has more than 10,000 members connecting on a multi- tude of topics.