Cernocky

The Custom Post Styles plugin is an easy way to customize css of your posts individualy using CSS code. 
Plugin adds css editor box in your post editor.
See it in action: 
https://vimeo.com/179525212
Improve the user experience for your readers without having to change theme code.
<h4>Possible upcoming features</h4>
<ul>
<li>Better CSS editor</li>
<li>Custom webfonts</li>
<li>Supporting more post types</li>
<li>Custom styles for posts by categories, authors etc.</li>
<li>Visual editor</li>
</ul>

Custom Post Styles

Allows you to add custom css styles to posts.

Gantry

<blockquote>
Gantry 5 is now available for WordPress! Please visit <a href="https://wordpress.org/plugins/gantry5/" title="Gantry 5" rel="ugc">Gantry 5</a> plugin page for more informations.
</blockquote>
Gantry 4 is a comprehensive set of building blocks to enable the rapid development and realization of a design into a flexible and powerful web platform theme.
<ul>
<li>
Please visit http://gantry.org to download a FREE WordPress Gantry 4 default theme which can be used as a base for your own themes!
</li>
<li>
For official RocketTheme Gantry forum please visit http://www.rockettheme.com/forum/gantry-framework
</li>
</ul>
Gantry 4 is packed full of features to empower the development of designs into fully functional layouts with the absolute minimum of effort and fuss.
<ul>
<li>True “Drag and Drop” page builder</li>
<li>Support for Responsive Layouts</li>
<li>LESS support</li>
<li>Syntax highlight support via Google Code Prettify</li>
<li>960 Grid System</li>
<li>Stunning Administrator interface</li>
<li>XML driven and with overrides for unprecedented levels of customization</li>
<li>Per override level control over any configuration parameter</li>
<li>Preset any combination of configuration parameters, and save custom presets</li>
<li>RTL language support</li>
<li>Built-in CSS and JS compression and combination</li>
<li>Flexible grid layout system for unparalleled control over block sizes</li>
<li>Optimized codebase with speed, size, and reuse core tenets of the framework design</li>
<li>65 base widget positions</li>
<li>38 possible layout combinations for mainbody and sidebars</li>
<li>Source-ordered 4 column mainbody</li>
<li>Many built-in widgets and gizmos such as font-sizer, Google Analytics, to-top smooth slider, IE6 warning message, etc.</li>
<li>Ability to force ‘blank’ widget positions for even more advanced layout customization</li>
<li>Flexible parameter system with ability to set parameters via URL, Cookie, Session, Presets, etc.</li>
<li>Table-less HTML overrides</li>
<li>Standard typography and WordPress core element styling</li>
<li>ini-based configuration storage for easy portability</li>
<li>Automatic per-browser-level CSS and JS control</li>
</ul>
For video tutorials and documentation please visit official <a href="http://gantry.org/" title="Gantry Framework" rel="nofollow ugc">Gantry Framework</a> site.

Gantry 4 Framework

Excellent Framework with plenty of options

Gantry is a comprehensive set of building blocks to enable the rapid development and realization of a design into a flexible and powerful web platform

Custom Post Styles vs Gantry 4 Framework