Jacob McKinney

WordPress plugin for setting and displaying primary categories for posts and custom post types*.
This plugin creates a meta box on the post edit screen titled “Primary Category” containing a drop down menu populated with all categories associated with that post**. Selecting a primary category and updating the post saves this data into a custom field with a meta key of “primary-category”.
To display a list of all posts with a particular primary category, use the shortcode [primary-category name=”cat_name”] where cat_name is the name of the primary category you wish to display. If a name is not specified, the shortcode will default to all posts with “uncategorized” set as the primary category.
*Note: Custom post types must support both categories and custom fields.
**Note: As new categories are added to a post, the post must be updated before those new categories will be available for selection as a primary category.

Primary Categories

WordPress plugin for setting and displaying primary categories for posts and custom post types.

Tobias Zimpel

Many themes, as well as other plugins, provide shortcodes for layout options like multi-column-layouts, tabs, etc.
By default, Contact Form 7 forms can not include shortcodes provided by WordPress or third-party-plugins or -themes. 
It only processes its own shortcodes used to generate form elements.
This plugin enables the usage of external shortcodes inside Contact Form 7 Forms.

Contact Form 7 Shortcode Enabler

Resolve the problem perfectily. Congratulations!

great plugin

This plugin enables the usage of external shortcodes inside Contact Form 7 Forms.

Primary Categories vs Contact Form 7 Shortcode Enabler