WordPress.org

This plugin gives you the ability to add a category introduction to each archive. No editing of your themes is required to use the plugin and a default layout is setup on install. Play with the html layout until you get exactly what you want. 3 tags are provided to give you access to the category data [categoryID], [categoryTitle] and [categoryDescription] also optionally you can use php if you are an advanced user. Tags are evaluated first, then php before the results are returned. For more detailed information and installation information please visit this plugins home page

The html layout has 3 tags available

1. [categoryID]
2. [categoryTitle]
3. [categoryDescription]