mohamad wael

Kt-cleanpress is a plugin designed to clean and optimize WordPress. It will give you the following options:
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<li>
Clean Posts: which will let you remove all posts marked as Trash / Pending / Draft with all their related contents from the database, and then it will defragment it.
</li>
<li>
Clean Pages: will do the same things described in Clean Posts, but it will process the pages.
</li>
<li>
Clean Comments: will do the same things described in Clean Posts, but it will process the Spam / Unapproved / Trash Comments.
</li>
<li>
Clean Post Revisions: Whenever a post is edited and saved WordPress automatically creates a backup to which one can revert. This option will remove all posts backups.
</li>
<li>
Clean Auto Draft: This is a left over from the process of creating a new WordPress page or post and not saving it as a draft of publishing it.
</li>
<li>
Clean Other Left Overs: Will remove navigation menus that are created but not saved, and all their related data, and will also remove unneeded lock and last entries in the database.
</li>
<li>
Clean Empty Categories / Tags: Will delete all categories/Tags that do not have any post or link associated with them but will not remove the default WordPress categories.
</li>
<li>
Optimize The Tables: Reclaim unused space and defragment the data file.
</li>
</ol>

KT-CleanPress

andyexeter

Post Lockdown protects your site-critical pages and posts by disabling all non-admin users’ ability to trash or delete them. 
It can also lock pages and posts, which will disable editing of the post as well as disabling trashing/deleting.
The plugin adds a new options page under the Settings menu in your WordPress admin panel which allows you to quickly search and 
select for all pages and posts of any post type. When you find the item you want to select, simply click it to move it to the right 
box and click Save Changes.
See the screenshots for an example of what an Editor would see when they view a list of posts with some locked and protected.

Post Lockdown

Works very well, my only criticism is that private posts/pages should be lockable, ie private posts should appear in the search form.

In order to lock them currently you need to publish them, then lock/portect, and then make it private again

Update!! the developer added the minor feuature request/bug. This plugin is now perfect!

Now perfect

I think the plugin is really useful, otherwise I wouldn't have made it ;)

Great Plugin

Allows admins to protect selected posts and pages so they cannot be trashed or deleted by non-admin users.

KT-CleanPress vs Post Lockdown