shawfactor

Publicly locked posts or pages functions exactly the same as published. EXCEPT only user with manage_options capability (usually only admin users) can edit the post or page.
Privately locked posts or pages functions exactly the same as private. EXCEPT only user with manage_options capability (usually only admin users) can edit the post or page.
In both cases only users with manage_options can assign a post or page to the above statuses. As a webmaster this functionality may be useful if there are posts or pages you do not want editors or similar roles amending.
Did you find this plugin helpful? Please consider <a href="https://wordpress.org/support/view/plugin-reviews/lh-locked-post-status" rel="ugc">writing a review</a>.

LH Locked Post Status

Creates two new posts statuses. Publicly locked and Privately locked.

daxitude

Create drafts of WordPress posts/pages/CPTs even after they’ve been published. And when you’re ready, merge the changes back into the original published post.
<h4>Features</h4>
<ul>
<li>Create multiple drafts of already published posts</li>
<li>Merge the changes back into the published post when you’re ready</li>
<li>Uses the published posts’s original post type, so metas, taxonomies, etc all are available in admin screens and can even be modified in the draft and merged back into the original post</li>
<li>Perform a post diff similar to WP’s default revision.php?action=diff with added ability to compare changes in post meta and taxonomies</li>
<li>See a notice when the original post has been updated ahead of a draft</li>
<li>Preview drafts in the post/page/CPT’s natural template</li>
<li>Since drafts all carry the same custom post status, they are organized in the admin’s edit.php with their own status filter (see screenshot-4)</li>
</ul>
This plugin requires javascript.
<h3>How Does it Work?</h3>
Go to a post’s edit screen and click on the “Save a Draft” button in the Drafts of Revisions postbox (make sure you’ve enabled the post type first). The post’s core data, taxonomies, and meta data are all copied into a new post – the draft – as a child of the original post. The draft has a custom post status; it will never show up in any queries for posts. You can create as many drafts as you like.
You can edit a draft’s post content, taxonomies, and meta data as you like and save progress with the native WP “Save Draft” button. You can also preview the draft and compare changes against the parent at any time (even comparing changes in taxonomies and meta data).
When you’re ready to update the parent post, click the Publish button from the draft’s edit page. All post data, taxonomies, and meta data are merged back into the parent post and the draft post is deleted.

Drafts of Post Revisions

Create drafts of WordPress posts/pages/CPTs even after they've been published

LH Locked Post Status vs Drafts of Post Revisions