What were the OSS versions of commenting plugins - that don't need a browser extension. Mobile browsers are not going to be able to use this. I run some sites

What were the OSS versions of commenting plugins - that don't need a browser extension. Mobile browsers are not going to be able to use this. I run some sites that are used in China, where FBcomments/disqus are blocked. As a site owner I'm also responsible for policing my comments section. But a separately hosted solution could be an interesting way around that.