Aaron Butacov

<a href="http://aahacreative.com/our-projects/wordpress-quick-save/" rel="nofollow ugc">WordPress Quick Save</a> adds a CTRL+S keyboard shortcut to trigger the Auto-save functionality in WordPress. If you find that you habitually hit CTRL+S while writing posts, this will stop those annoying popup save site windows from appearing.
No more having to stop and click save to ensure you don’t lose your recent edits. Keep in mind, this saves ONLY as an autosave.
This plugin should work with most versions of WordPress, but has not been tested in versions earlier than 2.9
<ul>
<li>Works in all major browsers.</li>
</ul>

WordPress Quick Save

Do you habitually press CTRL+S when writing? Do you fear missing posts? There's help!

PRESSMAN

Hiroshi Sekiguchi

kazunao

Shotaro Muraoka

PM Yosuke

kengotakeuchi

naotoshigenari

takagikenji

This plugin adds another comment functionality in post/edit screen. 
You can communicate with your editorial/admin team members within your WordPress screen. 
In the setting page, You can enable/disable the function for each post type.
<h4>UPDATE in version 2</h4>
<ul>
<li>Display comment list on the post list screen as well.</li>
<li>Show revision and status change in comment timeline.</li>
</ul>

Admin Edit Comment

This plugin adds another comment functionality in post/edit screen.

WordPress Quick Save vs Admin Edit Comment