TinyBB

TinyBB is an open-source forum software written in PHP, MySQL, and HTML.

AssociationForce

Domain for Sale.

Directly provides on-demand customer service apps.

Discourse is an open source discussion platform built for the next decade of the Internet.

FUDforum is a free and open source Internet forum software

Forumbee offers community forums for discussions, feedback and Q&A.

Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Mighty Networks enables entrepreneurs, organizations, and companies to create and grow a community-powered brand.

MyBB is a discussion board software that runs on PHP and MySQL

ProBoards is a host of free forums with customer service.

Shapado is a questions and answers site for your enterprise or community, your “knowledge base on…

Build an engaging community forum using Vanilla’s modern cloud forum software.

Wiggio is an online toolkit that makes it easy to work in groups. With Wiggio you can:

Intuitive. Social. Engaging. Fast. XenForo brings a fresh outlook to forum software.

esoTalk is a free, open-source forum software package built with PHP and MySQL.

jforum is a Java-based discussion board software.