Trace messages/data to a Debug Bar window from your theme or plugin. Requires the Debug Bar plugin
Eazy HTML5 Elements displays most HTML elements using a shortcode.
This allows theme developers to visualize how HTML elements will display.
Create child themes quickly and easily from your WordPress admin panel — clean, simple, and safe.
A plugin for developers. Gets instagram images by username or hashtag
This plugin will enable a fancy ajax functionality on simple sites and most themes.
Adds parent-category.php & child-category.php templates to the template hierarchy with all the normal hierarchical behavior with conditional tags to match.
This plugin is intended for theme developers to use. It shows the current template being used to render the page, current post type, and much more.
WP Fake Image Replacer generates fake post thumbnail images. Useful in theme development process. Now works with ACF fields.
Auto import content on plugin activation, or import a file from the server.
A plugin for developers. Gets tweets by username or hashtag
Allow (certain) users(roles) to easily switch to another theme.
Non-persistent, so regular users won't be bothered.
Funking up your texts by selecting html elements in your theme and assigning animation styles.