RaymondDesign

When you want to place a small text rule, an advertisement or something else at the top or bottom of your post or page, it is possible to edit your theme. But you lose all your changes when you update you theme. 
With Post & Page Notes, shortly PPNotes you can put your own text or image on a post or page, without editing your theme. So, when you update your theme or something else the Post & Page Notes are kept.
When you have installed this plugin, you have two forms, one for the header text and one for the footer text. For every form (header and footer), you can set where you want to show the text. You can choose from a list: ‘Post’, ‘Page’ and ‘Post & Page’. If you choose ‘Post’ the header or footer is visible at every single post, if you choose ‘Page’ the header or footer is visible on every page (except the pages with single posts and the archives). If you choose ‘Page & Post’ the header or footer is visible on both single posts and pages.
In the text fields, you can type plain text or (x)HTML, so it’s possible to place (nice styled) div’s or images at the top of your posts or pages.

Post & Page Notes

Post & Page Notes, shortly PPNotes is a plugin to simply at a header and footer to your posts and pages, without editing your theme.

WordPress Admin Notepad is a plugin for wordpress 3.0+ that allows selected user group to view or edit notes as long as they are logged into admin panel.
WordPress Admin Notepad automatically creates a show/hide notepad toggle at top right corner (beside log out link) so that users can access their notes at anywhere.
WordPress Admin Notepad supports ONLY WordPress 3.0 and above, that is after wordpress added Roles & Capability.
What’s New
<ul>
<li>You can now configure the permission to view or edit the notes for the 4 user levels (editors, author, contributor and subscriber).</li>
<li>You can now save the state of notepad (visible or hidden)</li>
<li>Notepad now supports cyrilic texts</li>
</ul>
Features
<ul>
<li>Allows selected user groups (roles) to edit/view notes at anywhere in admin panel</li>
<li>The toggle at top right corner can be disable</li>
<li>Save the state of notepad (visible or hidden)</li>
<li>Configure the permission to view or edit the notes for the 4 user levels (editors, author, contributor and subscriber)</li>
<li>Size of notepad can be personalized (slim or normal) and will be saved using cookie</li>
</ul>
<a href="http://zenverse.net/wordpress-admin-notepad/" rel="nofollow ugc">Plugin Info & Homepage</a> | <a href="http://zenverse.net/" rel="nofollow ugc">Plugin Author</a>

WordPress Admin Notepad

Add a Notepad to your admin panel so that you can view or edit note at anywhere.

Post & Page Notes vs WordPress Admin Notepad