stesvis

This plugin allows you to choose which post categories youe site will show on your pages. Just go to settings and deselect the categories that you want to hide. 
For the homepage it will work automatically, for the other pages you have to add a shortcode into the page.

WP Filter Post Category

ammar.shahraki

Blog Post Filter is a plugin that allow the site administrator selects which categories should be shown on the site frontpage. Only posts that are in the selected categories would be shown on the site main loop.
Major features of Blog Post filter include:
<ul>
<li>Simplicity: In contrast with similar plugin this plugin is very simple and easy to use.</li>
<li>Efficiency: The plugin has a minimum processing overhead on the site.</li>
<li>Multilingual: Supports Persian and English admin page translation.</li>
</ul>

Blog Post Filter

in fact I am the publisher of the plugin and it's natural that I rate it the best.
But, indeed it does the work that is expected without adding any complexity. Just install it and select the categories that you would like to appear on the front page.



Simple and effective

Blog Post Filter filters frontpage posts by their categories.

WP Filter Post Category vs Blog Post Filter