jekyll-tagging
https://github.com/pattex/jekyll-tagging

jekyll-paginate
gem install jekyll-paginate

jekyll-seo-tag
https://github.com/jekyll/jekyll-seo-tag

jekyll facebook-comments
https://joshuacox.github.io/jekyll/2015/11/28/facebook-comments-and-jekyll/

jekyll-admin
https://github.com/jekyll/jekyll-admin