A plugin to build user communities all around WordPress.
http://wordpress.org/extend/plugins/alkivia/
Content Management System
Get access to data on 66,109 websites that are Alkiva Open Community Customers. We know of 9,852 live websites using Alkiva Open Community and an additional 56,257 sites that used Alkiva Open Community historically and 4,043 websites in the United States.
Get a list of 66,109 websites using Alkiva Open Community which includes location information, hosting data, contact details, 9,852 currently live websites and an additional 10,681 domains that redirect to sites in this list. 56,257 sites that used this technology previously and 4,043 websites in the United States currently using Alkiva Open Community.