This template might come in handy, if you want to display all articles , independently from their category/subcategory. The headline will be used as the section/root category.

As a requirement, you have to select the (root) section (or any other section, which will hold all articles) beside the individual categories as well, when creating articles.
(Will post later an article form template, which will take care of it while creating articles from the frontend)

The template is based on the 1.4.7 "default" category index template and made for version 1.4.7.
UPDATED to work with ME Resources 1.5.4

Additional parameter explanation:

Category index: Opton to show/hide the (section) category index. The term (Category index) itself can be changed in the language file.

Description: Display Description for Category Index to be consistent with other categories

Description Image: Display Description Image for Category Index to be consistent with other categories

Label: Language file -> will display the language match of CATEGORY INDEX
Section name -> will display the section name
Alternative label -> will display content of field Alternative Label

Alternative Label: Text field, which will be displayed if selected under field Label

Category Index as link: The category index can be used as a link to display a section/category.

Highlight category index: Highlight (bold) the category index, if selected.

Count category index: Displays number of assigned articles.

Count Mode: displays either the number of articles assigned to the section/root category or counts the number of articles in the next category level.

Category color (selected): Display selected category with a different color. Use color name or hexcode. see http://www.w3schools.com/css/css_colornames.asp

ToolTip: Displays a Joomla-ToolTip from either description or meta description field. It can display a HTML tooltip.

Display Article: If a category contains only 1 Article, it will go directly to the article without displaying the list view

Updated to V1.5.2 on 10/01/2011

Added Display Article based on a suggestion/feature request
http://www.mightyextensions.com/support/feature-request/item/37-feature-request/25376-category-index-change

Save Template-Parameters after installing.

Updated to V1.5.1 on 05/10/2010

URL Fix

Updated to V1.5 on 28/09/2010

Updated for ME Resources V1.5.4
small fixes

Updated to V0.9.5 on 12/07/2010

Based on the discussion in http://www.mightyextensions.com/support-desk-forum/item/tickets-topics/32-resources/23728-lost-category-item-count-num-all-categories-show-0
we added a new parameter Count Mode.
It displays either the number of articles assigned to the section/root category or counts the number of articles in the next category level. See attachment in comment below.

Updated to V0.9 on 15/03/2010

Updated tags to XHTML 1.0 conformity.

Specified image dimensions for faster rendering in browser.
See: http://code.google.com/speed/page-speed/docs/rendering.html#SpecifyImageDimensions

Updated to V0.8 on 26/02/2010

Removed "Compatibility Switch" (MightyExtension "default" behaviour can be realized by switching the options off, empty the Category color and set the Label to "Language File".)
Added Description (Display Description for Category Index to be consistent with other categories)
Added Description Image (Display Description Image for Category Index to be consistent with other categories)

Updated to V0.7 on 24/02/2010

Removed all SQL-Queries
Removed Home category (Template will now determine the correct Home category)
Optimized Count category index (removed SQL-Query)
Optimized Display ToolTip (removed SQL-Query)
Added Features to ToolTip (content can come from description or meta description field)
Added Label (Label can come from Language file, section name or from Alternative Label)
Added Alternative Label (Text field to define label)

Updated to V0.6 on 23/02/2010

Added Display ToolTip
Added Category Color (selected)
Added Count category index
Changed behaviour of Home category to display only sections.