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.

shawfactor

LH Dashboard Notes allow you to insert noes on your wp-admin dashboard for your users using the post editor interface. If this plugin is network activated the insertion and editing of these dashboard notes is centralised on the main site of your multisite install. Allowing you to set Dashboard notes that are viewed throughout your multisite network.

LH Dashboard Notes

Allows you to create and edit notes that appear on the admin dashboard

Kahi's WP Notes vs LH Dashboard Notes