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!

MyWebsiteAdvisor

ChrisHurst

Plugin for WordPress Developers to enhance Theme and Plugin Editors on their WordPress site. 
Uses the Codemirror library to make the default theme and plugin editors for wordpress more powerful.
Developer Website: http://MyWebsiteAdvisor.com
Plugin Page: http://mywebsiteadvisor.com/tools/wordpress-plugins/developer-code-editor/
Requirements:
Plugin is for WordPress Developers!
To-do:

Developer Code Editor

Plugin for WordPress Developers to enhance Theme and Plugin Editors on their WordPress site.

WordPress Quick Save vs Developer Code Editor