A simple example of a Liquid tag for Jekyll.

README.md

Throw this in your plugins folder and then in your posts or pages, you would just have something like:

Checkout my Twitter feed! {% social_link twitter pgib %}

jekyll-social_link.rb

module Jekyll
  class SocialLinkTag < Liquid::Tag
    def initialize(tag_name, text, tokens)
      super
      @args = text.split(' ')
    end

    def render(context)
      case @args[0]
      when 'github'
        '<a href="https://github.com/' + @args[1] + '"><i class="icon-github"></i></a>'
      when 'twitter'
        '<a" href="https://twitter.com/' + @args[1] + '"><i class="icon-twitter"></i></a>'
      end
    end

  end
end

Liquid::Template.register_tag('social_link', Jekyll::SocialLinkTag)