Plugins on the list:

Redirection

By John Godley

Manage 301 redirects, track 404 errors, and improve your site. No knowledge of Apache or Nginx required.

Categories: General

Check posts, pages & all content for broken links to improve SEO. Get notified when bad links are found.

Categories: General

Translate WordPress plugins and themes directly in your browser

Categories: General

Easily post syntax-highlighted code to your site without having to modify the code at all. As seen on WordPress.com.

Categories: General

Allow PHP in posts and pages allows you to add php functionality to Wordpress Posts and Pages

Categories: General