amielucha

Customizer Plugin is a tool built for WordPress Theme Developers and Plugin Developers. It extends Customizer panel introduced in WP 3.4.
With Customizer Plugin you can:
<ul>
<li>quickly add your theme’s or plugin’s options to the Customizer Panel without leaving the frontent preview</li>
<li>take advantage of both serialized and non-serialized Theme Options</li>
<li>add dropdowns, colour pickers, image uploaders, radio options and more</li>
<li>extend your current theme to enable front-end customizations</li>
</ul>
Check this <a href="http://wp-customizer.com/user-guide/" title="How to configure Customizer" rel="nofollow ugc">quick user guide</a> for examples of how to configure WordPress Customizer.
Download the alpha version now and discuss the functionality or report a bug. Your feedback is appreciated.
<h4>Upcoming Features</h4>
The plugin is currently being developed to support even wider range of features and increase developers’ productivity. The final release will include:
Import / Export
Once you add your Theme Options to the Customizer’s panel you can save them to a .csv file and import into another project.
White-label mode
Future release will allow you to add controls to the front-end Customizer Panel, export them to a csv file and seamlessly integrate with your product (Theme or Plugin).
More Option Types
If the default text, image, color, radio, select and checkbox arent enough.

Customizer

Add theme's or plugin's options to the WordPress Customizer. Build theme and plugin options accessible from WordPress front-end.

Mark Howells-Mead

Adds a new column to the WordPress admin post list view, containing a preview of the post’s featured image (where available).
<h3>Hooks</h3>
Developers can use the <code>mhm-list-postthumbnail/exclude_posttype</code> filter to exclude the post thumbnail column from certain post types as required. The filter accepts and returns an array.

Add post thumbnail to wp-admin list view

Adds a new column to the WordPress admin post list view, containing a preview of the post's featured image (where available).

Customizer vs Add post thumbnail to wp-admin list view