Here is list of available software from my hosting company, $150/yr, for Forums, and Social Networking. Another I had on my own server was Citadel, (citadel.org).

Good luck, because most people use there cell phones now days and a lot of sw like those listed are just not meant for that format.

Forums:

phpBB - phpbb.com SMF - simplemachines.org MyBB - mybb.com bbPress - bbpress.org XMB - xmbforum2.com Flarum - flarum.org ElkArte - elkarte.net FUDforum - fudforum.org miniBB - minibb.com TidyBB - tidybb.co.uk Flatboard - flatboard.org

Social Networking:

pH7Builder - ph7builder.com Jcow - jcow.net Open Source Social Network - opensource-socialnetwork.org HumHub - humhub.org Family Connections - familycms.com Elgg 6 - elgg.org