Tranons

A simplistic plugin that allows for the furthur customization of your category list. This will allow you to create a custom category list which will show the categories you want, and will hide the categories you do not want. For example, say you have a particular category you don’t want to be displayed named “Announcements”. You can use this plugin to display all of your other categories, except the category “Announcements”. You are not limited to just excluding one category; you can exclude multiple categories. Essentially, this plugin provides more functionality to your category list.

Category Excluder Widget

This widget allows you to easily create a specific category list. You can exclude any categories you please.

paulperkins

The Bimblers Exclude Posts plugin is used to exclude selected post categories from the main loop.
This might be useful if you use WordPress posts to author content which should not be listed on the front page, 
but you still want to utilise the features of a WordPress post type and do not want to go to the effort of 
setting up custom post types.
At this point in time, the post categories excluded by the plugin are hard-coded in the main class file. A future 
version of the plugin will include a configuration GUI.

Bimbler Exclude Posts

Excludes selected posts from the main loop. Filters by post category.

Category Excluder Widget vs Bimbler Exclude Posts