BuddyPress.org

I had a very brief look. It has the very big advantages of being easy to set up and integrate with one’s theme. It’ll be a nice choice for people who need something very quick and easy.

From a brief look, the code is written in such a way that doesn’t even make an attempt to be extensible for developers. In that sense it’s not even in the same league as BuddyPress.

I’m very glad to see that the market is fleshing out with fundamentally different kinds of solutions!