rajuru

<p>Using this plugin, you can display a text widget for any specific category and/or its sub-categories. For example, you want to show different sidebar banners based on different category. It is easy using this plugin. Just create a new widget and select the category.</p>


Category Widgets

neoslab

<p>Powered Minifier allow you to reduce your page load and increase your performance by minifying your HTML source along with all the CSS and JS code present in your markup.</p>
<h3>License</h3>
<p>Good news, this plugin is free for everyone! Since it’s released under the GPL, you can use it free of charge on your personal or commercial site.</p>


Powered Minifier

Honestly it's the best minifier plugin for Wordpress 

Simply Excellent

Reduce your page load by minifying your HTML source along with all the CSS and JS code present in your markup.

Category Widgets vs Powered Minifier