Jeffrey

Contact Form 7 is an awesome WordPress plugin that provides all sorts of great features for creating Contact Forms. 
I’ve used it on a lot of sites with great succes.
One thing it doesn’t handle though, are customfields. 
With this plug in you can now use customfields in the mail section of Contact Form 7!
I created this plug-in because I had the need to use the same contact form on numerous places but the email adresses needed to be diffrent for all of them. 
(I was using it to create a showcase website in wich visitors are able to contact the creator of the work/art, without showing the full email adress)
What you could do with this might include:
<ul>
<li>Use the same contact form in different posts/pages</li>
<li>Send custom field values in the email </li>
</ul>
There are many more case-specific examples. I searched for a solution, but there was none to be found. 
This plugin provides an elegant solution that leaves the Contact Form 7 Plugin intact.
<h4>WHAT DOES IT DO?</h4>
This plugin provides a new special mail tag for the mail section of the Contact Form 7 Plugin. It allows you to get custom field values in the mail section of Contact Form 7
<h4>HOW TO USE IT</h4>
After installing and activating the plugin, you should use it like the following:
Double underscores are key!
The plug in recognizes a new special mail tag: 
[_customfield]
The tag alone doesn’t work though! 
You need to add two underscores after the tag: 
[_customfield__]
After this you can enter your custom field key i.e.: 
[_customfield__fieldName]
<h4>NOTE</h4>
Multiple values per key (an array) are converted to a comma separated string.

Contact Form 7 Customfield in mail

This plugin provides a new tag type for the Contact Form 7 Plugin. It allows the use of customfields from a post to be used in the mail section

Diana van de Laarschot

The default custom menu in WordPress only allows adding a link that leads to a list of posts and pages belonging to a taxonomy (category, tag, etc). If you want to list the posts and pages themselves and if you want WordPress to do this automatically for you, then I hope you will find this plugin useful.
Also works for custom taxonomies and custom post types 
NEW: CPCM V3 now provides support for Full Site Editing with the Gutenberg Block Editor 
WARNING: Coming from version 1.x? There are breaking changes, read the changelog before upgrading.
<h4>Using it</h4>
Enable the plugin and go to either Appearance > Menus or Appearance > Customize or Appearance > Editor. Add a category (or other taxonomy like tag or custom) to the menu. Next, you can choose if you would like to replace the category by the posts or pages themselves.
For each Category in your menu, you now have the following extra configuration options:
<ul>
<li>Replace by posts in the category y/n; </li>
<li>specify the (maximum) number of posts you want to show for this item (max 10);</li>
<li>their ordering ascending or descending by Title, Date or Menu Order;</li>
<li>specify the title for the menu items. For this you can use %post_title, %post_author and other wildcards, see ‘Other Notes > Wildcards’. Default value: %post_title</li>
</ul>
<h4>Wildcards</h4>
You can control the title of the menu items generated by the plug-in with the following wildcards:
<ul>
<li>%post_title</li>
<li>%post_author</li>
<li>%post_date for the unformatted post date: 2012-11-10 18:14:23</li>
<li>%post_date() for a formatted post date with the following default formatting: November 10th, 2012</li>
<li>%post_date(<your formatting here>) for custom date formatting. Example: %post_date(l jS \of F Y, h:i:s A). See <a href="https://codex.wordpress.org/Formatting_Date_and_Time" rel="nofollow ugc">https://codex.wordpress.org/Formatting_Date_and_Time</a> for formatting options.</li>
<li>%post_date_gmt</li>
<li>%post_date_gmt()</li>
<li>%post_date_gmt(<your formatting here>)</li>
</ul>

Category Posts in Custom Menu

Dynamic menus: List all posts from a category in your menu. Also works for tags, custom taxonomies as well as pages and custom post types.

Contact Form 7 Customfield in mail vs Category Posts in Custom Menu