Proboards - ProBoards is a host of free forums with customer service.
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PlushForums - PlushForums is a modern online forum hosting platform.
XenForo - Intuitive. Social. Engaging. Fast. XenForo brings a fresh outlook to forum software.
ZetaBoards - ZetaBoards offers free forum hosting that serves a site for growing an online community.
Vanilla - Vanilla is a free Mac app that lets you hide icons from your menu bar.