vBulletin - Build a community website with the leading forum software, vBulletin 5 Connect, or in the cloud on vB Cloud!
Froged - One click solution providing easy-to-use marketing, sales and support services to turn website visitors into happy customers.
Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.
Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value
XenForo - Intuitive. Social. Engaging. Fast. XenForo brings a fresh outlook to forum software.
ChatWoot - Open-source omnichannel customer engagement platform