Edward

Enables the display of custom-field variables in the WordPress post editor via a TinyMCE button. Works well with custom post types as well as default post types.
Use the TinyMCE button to choose from a list of custom fields attached to the post to insert, or manually specify a custom field to display using the following syntax:
<pre><code>{%custom_field_name%}
</code></pre>

Custom Field Variables

Enables the display of custom-field variables in the WordPress post editor via a TinyMCE button. Works well with custom post types as well as default  …

Sergey Biryukov

Samuel Wood (Otto)

In core ticket <a href="https://core.trac.wordpress.org/ticket/28206" rel="nofollow ugc">#28206</a>, the editor was modified to have a Link Text field instead of a Title field.
This plugin adds the Title field back.

Restore Link Title Field

Adds back the missing "title" field in the Insert/Edit URL box in WordPress 4.2

Custom Field Variables vs Restore Link Title Field