This document discusses work package 4 (WP4) of a project which involves developing extensions to existing collaboration tools to support diversity. It outlines two tasks: T4.1 which involves developing extensions for tools like WordPress and MediaWiki over three years, and T4.2 which involves producing best practice documents. It then provides more details on the planned extensions for WordPress and MediaWiki, and brainstorms potential scenarios for applying the extensions, such as adding links to related but different opinions in blogs, and checking biases in sources for wiki articles.