Code Soup

The Web Archive plugin for WordPress provides a simple yet powerful way to create HTML copies of pages or any post type upon their publication.
This functionality allows website owners and administrators to keep track of all previous versions of the same page or post, ensuring that changes, updates, and iterations are recorded and retrievable at any moment. 
This is especially useful for content management, auditing, and compliance purposes.

Web Archive

Automatically creates HTML copies of your posts and pages when they're published, allowing you to track every version.

Ethan Allen

UserDocs lets you create a section of your site dedicated to product documentation. Create anything from software documentation, to how-to’s, to product specs, the possibilities are endless. Spend less time answering support requests, get UserDocs!
Besides a good feature rich product and amazing support; Product Documentation also plays an important role in terms of customer satisfaction and revenue. If there is no documentation available on the product site,\ customers will be forced to submit a support ticket costing your team valuable time.
Self help guides allow customers to go through frequently asked questions and general queries and help them resolve small issues on their own. Good documentation contains easy navigation and a clean layout with better readability. Step by step explanation with screenshots helps too. UserDocs has you covered.

UserDocs

A simple user documentation plugin for WordPress.

Web Archive vs UserDocs