LIST-OF-more-open-source-commenting-systems_Disqus-alternatives.txt

https://www.oopspam.com/blog/open-source-comment-systems-their-anti-spam-capabilities

http://remark42.org (! - looks a bit like the classy comment system of http://deviantart.com )
https://schnack.cool/

Isso

Isso-next

HashOver

HashOver-nexgen

phpCommentics (?!?)
phpChatSystem

slack.com open-source alternatives
discord.com open-source alternatives
http://youtube.com open-source alternatives - http://d.tube
http://vimeo.com
http://vcloud.co (!?!)