Ning is a social networking tool. The sign-up is free and you are able to create private and public networking sites. A public site is like a Web site where everyone can see what you put up. A private site requires that you invite users to join the site for them to be able to see the content.
I have been using Ning for about 6 months now. I have created 3 Ning sites so far, one for our family that is spread out all over the U.S., Europe, and Africa. I created this one as a private network so that only those I invite can join our network. I also created a private site for our Boy Scout troop. I created one public site for the Scoutreach Division of our local Boy Scouts of America, of which my husband is the director. He uses this site to communicate with parents, volunteers, and others in his district about events and what is going on with scouting in his district.