Flourish Pixel

Remove/Exclude specific categories from site RSS Feed. You just need to install this, then place your category id in it’s option page and save. That’s all. If you want to exclude more than one category, then place them one by one and separate them by comma.
For Example: -1,-2
**Note: you must need to use minus sign (-) before category id.

FP RSS Category Excluder

Remove/Exclude certain categories from site RSS Feed.

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.

FP RSS Category Excluder vs Bimbler Exclude Posts