For me, it’s place to leave notes about future articles, possible topics, ToDos connected with that particular WP site.
Nothing more to explain. <a href="http://kahi.cz/wordpress/wp-content/images/kahis-notes-plugin/notes-screen.png" rel="nofollow ugc">See the screenshot</a>. Making notes inside your WordPress, as simple as possible.
For more information, support, giving feedback or anything – see the <a href="http://kahi.cz/wordpress/wp-notes-plugin/" rel="nofollow ugc">official plugin’s site</a>.
<h4>Requirements</h4>
PHP 5 on your server is necessary to run this plugin.

Kahi's WP Notes

For me, it's the place to keep notes about future articles, possible topics, plans, ToDos connected with that particular WP site.

durgathakur

This plugin allows you to add textual annotations to images by select a region of the image and then attach a textual description, the concept of annotating images with user comments. Integration with JQuery Image Annotation from Chris (http://www.flipbit.co.uk/jquery-image-annotation.html) with PHP support from GitHub (http://github.com/stas/jquery-image-annotate-php-fork).
Some features:
<ul>
<li>Admin page</li>
<li>Option to approve, edit amd remove image notes in admin page.</li>
<li>Auto insert unique id attribute for all the images for image note.</li>
<li>Show notes on other pages such as home and archive.</li>
<li>Gravatar in the notes</li>
<li>Option to sync with wordpress comments.</li>
<li>Option to show thumbnail in comment list.</li>
<li>Option to include post id in every auto insert images id.</li>
<li>‘Mouseover to load notes’ on top of every image note (editable).</li>
<li>‘Link’ on top of every image note if hyperlink image (editable).</li>
</ul>

wp image annotation

Allows you to add textual annotations to images by select a region of the image and then attach a textual description.

Kahi's WP Notes vs wp image annotation