pressedsites

<a href="http://pressedsites.com/wordpress-save-hijack/" rel="nofollow ugc">WordPress Save Hijack</a> 
Adds a keyboard shortcut to trigger the Publish/Update functionality in WordPress posts.
This plugin should work with most versions of WordPress
<ul>
<li>Works in all major browsers. (on osx anyway please give feedback if find different on windows)</li>
</ul>

WordPress Save Hijack

Enables keyboard shortcuts for saving post edits (ie. cmd+s / ctrl+s)

Ole-Kenneth

WP Live Edit is WordPress plugin that enable the user to update the content, live, on the blog. Don’t waste time going back and forth between the admin panel and the site. Just update the content immediately while reading the blog post. The plugin is using WPs strict user control access before enabling this feature, so only the users allow to edit the blog post can do it.
This now works for both posts and pages.

WP Live Edit

WP Live Edit is Wordpress plugin that enable the user to update the content, live, on the blog.

WordPress Save Hijack vs WP Live Edit