Tags and Cats
Let’s make an index page for both our categories and tags for our jekyll blog
First you will need to properly tag and categorize your posts, to do this add lines like these in your front matter:
category: jekyll
tags:
- jekyll
Then for a category cloud you’ll need to add something like this to a file presumably in categories/index.html
<ul class="category-cloud">
{% for category in site.categories %}
<a style="font-size: {{ category | last | size | times: 100 | divided_by: site.categories.size | plus: 70 }}%" href="#{{ category | first | slugize }}">
  {{ category | first | capitalize }}  
</a>
{% endfor %}
</ul>
then for a list of the categories you’ll need to add some lines like this:
<h2>List</h2>
<div id="category-list">
{% for category in site.categories %}
<div class="category-group">
{% capture category_name %}{{ category | first }}{% endcapture %}
<h3 id="#{{ category_name | slugize }}">{{ category_name | capitalize }} /</h3>
<a name="{{ category_name | slugize }}"></a>
{% for post in site.categories[category_name] %}
<article class="category-item">
<h5>- <a href="{{ root_url }}{{ post.url }}">{{post.title}}</a></h5>
</article>
{% endfor %}
</div>
{% endfor %}
</div>
Then for a tags cloud you’ll need to add something like this to a file presumably in tags/index.html
<ul class="tag-cloud">
{% for tag in site.tags %}
<a style="font-size: {{ tag | last | size | times: 100 | divided_by: site.tags.size | plus: 70 }}%" href="#{{ tag | first | slugize }}">
  {{ tag | first | capitalize }}  
</a>
{% endfor %}
</ul>
then for a list of the tags you’ll need to add some lines like this:
<div id="tags">
{% for tag in site.tags %}
<div class="tag-group">
{% capture tag_name %}{{ tag | first }}{% endcapture %}
<h3 id="#{{ tag_name | slugize }}">{{ tag_name | capitalize }} /</h3>
<a name="{{ tag_name | slugize }}"></a>
{% for post in site.tags[tag_name] %}
<article class="tag-item">
<h5>- <a href="{{ root_url }}{{ post.url }}">{{post.title}}</a></h5>
</article>
{% endfor %}
</div>
{% endfor %}
</div>
You should now have two pages that nicely index your tags and categories.