NOT ON THE LIST IN 2018

Build a social  platform that you can use to set up  a social network for your company, school, sports team or niche community – all based on the power and flexibility of WordPress.

Website: buddypress.org
Cost: Free. Open Source
Availability: Download

Past Overall Rankings
2017: –     2016: –    2015: –    2014: –    2013: –    2012: 85    2011: 90    2010: –    2009: –    2008: –    2007: –