Greg - SiteOrigin

<p>The Theme Checklist plugin is an unofficial tool to help developers get their theme ready for the WordPress.org theme directory. Install the plugin, then navigate to Tools > Theme Checklist to start checking.</p>
<p>We’ve compiled a some of the most common theme issues that we see in the theme review queue and put them on our site, <a href="http://themechecklist.org" rel="nofollow ugc">Theme Checklist</a>. This plugin simply loads in all the latest checks and gives you an easy interface to check off the issues as you check them in your own theme. Each issue has a detailed description with examples to help you avoid the them in your own theme.</p>
<p>Checks are dynamically loaded from the <a href="http://themechecklist.org" rel="nofollow ugc">Theme Checklist</a> website to ensure you’re always working with the latest version of the checks. If this fails, the plugin will fall back to the bundled checks in checks.json.</p>


Theme Checklist

The Theme Checklist plugin is an unofficial tool to help developers get their theme ready for the WordPress.org theme directory.

Helen Hou-Sandi

<p>Really Simple Gallery Widget adds a widget to display images from the Media Library, no extra uploading or creating custom post types required. You can choose to show images from a specific post/page, the entire media library, or a specific set of attachment IDs. On single pages/posts, you can also show only images attached to the item currently being viewed. Especially helpful if your galleries are based on what’s attached to a post and you want to be able to easily display those images in a widget area.</p>
<h4>Features</h4>
<ul>
<li>Add as many widgets as you want, wherever you want</li>
<li>Display images from a specific post/page, the entire Media Library, or a specific set of attachment IDs</li>
<li>Display images from the post/page currently being viewed</li>
<li>Select a number of images</li>
<li>Select any registered size in WordPress</li>
<li>Display the images in various orders</li>
<li>Show or hide captions</li>
<li>Link the images to the original file, post, anchor in the post, attachment page, or nothing. NOTE: If the image is not attached to a post, the file link will be used instead of the post or anchor in the post.</li>
<li>Add a prefix to the link and image title (appears as a tooltip)</li>
<li>Use a rel attribute for the link – great for lightboxes</li>
</ul>


Really Simple Gallery Widget

Simple widget for displaying images from the Media Library with plenty of configurable options.

Theme Checklist vs Really Simple Gallery Widget