mosseh

For more information see http://www.amoss.me.uk/tag/selective-reading/
Features
<ul>
<li>Category widget is updated with show/hide links for each category.</li>
<li>Works for unregistered users (using cookies)</li>
<li>Works for hierarchical categories</li>
</ul>
TODO/Planned Features
<ul>
<li>AJAX Reload post list after change of selection (currently refreshes whole page)</li>
<li>Configuration for contents of show/hide etc.</li>
<li>Hide links when javascript is disabled (plugin depends on javascript)</li>
<li>Tooltip when first clicked hide or show</li>
<li>Strikethrough category name when hidden</li>
<li>Notify when can’t unhide child due to hidden parent</li>
<li>Clearer indication of hierarchical hiding when hierarchical display is disabled?</li>
<li>Better error checking</li>
<li>Autoformat code</li>
<li>Support for WP super cache – does not currently function for unregistered users with this plugin enabled</li>
</ul>

Selective Reading

Allows website visitors to deselect categories they don't want to see on your blog.

Michael Adams (mdawaffe)

Just One Category will cause WordPress to display on a category archive page 
only those posts which are direct members of that category, i.e. this plugin 
will exclude from that category page all posts which belong to any of that 
category’s subcategories but do not belong to the category itself.

Just One Category

On a category's archive page, displays only the posts directly in that category, not in any sub-categories.

Selective Reading vs Just One Category