This simple plugin allows you to add complete descriptions to categories, which are not limited to 255 chars and may contain bbcodes, so that categories turn into pages too.
Parser modes:
This plugin supports editing pages with CKEditor as well as markItUp. You should install the CKEditor plugin to enable it.
You can select a preferred editor in plugin settings. If CKEditor is chosen, category descriptions will use HTML parser. Otherwise markItUp! and BBcode parsing will be used.