Makoto

This plugin allows you and your visitors to add comment as 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. 
The text is intergrated with WordPress comment system. 
Integration with <a href="http://www.flipbit.co.uk/jquery-image-annotation.html" rel="nofollow ugc">JQuery Image Annotation from Chris</a> with <a href="http://github.com/stas/jquery-image-annotate-php-fork" rel="nofollow ugc">PHP support from GitHub</a>. 
Modified from <a href="http://www.superwhite.cc/demon/image-annotation-plugin" rel="nofollow ugc">Demon Image Annotation version 1.0</a>. 
Icons from <a href="http://www.famfamfam.com/lab/icons/silk/" rel="nofollow ugc">Fam Fam Fam</a>
Features:
<ol>
<li>Ability to add notes to your uploaded pictures.</li>
<li>Show notes on single page, front page, archive page and etc.</li>
<li>Notes synced with WordPress commenting system but there’s option to turn it off.</li>
<li>Gravatar in the notes.</li>
<li>Commentator’s name in the notes.</li>
<li>Image thumbnail appear at comment area, but there’s option to turn it off.</li>
<li>No hard coding required.</li>
<li>Admin page.</li>
<li>Remove all database if you wish to not using the plugin anymore.</li>
</ol>

Guan Image Notes

Image tagging system sync with WordPress comment system. Or also known as image notes, or image annotation.

mansurahamed

iworksolo

Use the shortcode [private-user-notes] to any page or anywhere to turn it into a user private note page or section. Users will be able to add private notes there using a rich text editor. The notes are only visible to user himself as it’s private right! 
It also gives user option to print their private notes with a single click.
This could be really useful for membership sites where you might want users to be able to save private note in any page,tab or their profile.
Admin can control who can use this feature and be able to save private note. It provides a plugin settings page under Settings inside dashboard where access settings will be found.
Official Developer: <a href="https://www.fiverr.com/mansurahamed706" rel="nofollow ugc">Mansur Ahamed</a>

Private User Notes

Perfect for my need!

It works!

User-private frontend notes: save, edit, print. Restrict by role/user.

Guan Image Notes vs Private User Notes