John Godley

User Permissions is a plugin that takes the simple WordPress permissions models one step further and allows you to assign permissions to specific posts that restrict users or roles from reading or editing it.
To summarize:
<ul>
<li>Restrict reading or writing of post or page according to the user’s role (i.e. prevent non-registered users reading a post)</li>
<li>Allow specific users to read or write a post or page</li>
<li>Permissions are assigned directly inside the post itself – there is no additional interface</li>
<li>Fully localized</li>
</ul>
<h3>Documentation</h3>
Full documentation can be found on the <a href="http://urbangiraffe.com/plugins/user-permissions/" rel="nofollow ugc">User Permissions Page</a> page.

User Permissions

This plugin provides the ability to configure post-specific permissions.

MMDeveloper

A wordpress plugin that allows you to secure your site from changes. You can prevent changes to your wp-admin, wp-content, wp-includes directories. Use this plugin if you got a nasty virus making changes to your site, cos it won’t be able to make changes if the site is non writable. There are some cons though, you won’t be able to upgrade if the site is completely non writable. When you do want to upgrade, make everything writable beforehand.
Built by The Marketing Mix Perth: https://www.marketingmix.com.au

User Permissions vs Stop Write