* Vanilla Forums
https://vanillaforums.com/en/

– Ada self-hosted dan cloud-hosted.
– Design customization
– Bisa integrasi dengan WordPress, Salesforce, Zendesk, Mailchimp, dll.

* bbPress

* phpBB
https://www.phpbb.com/

* Ninja Post
http://www.ninjapost.com/

* Node BB
https://nodebb.org/