Some Wordpress plugins are often updated, which is good think. Plugins that are updated are 100% compatible with last Wordpress version and they also are the most secure possible. A plugin that has not been updated for a long time might not work with last Wordpress version and might create a security breach for you website.
WP Slug Translate can translate the post slug into English. It will take the post ID as slug when translation failure.
Easily add posts to pages. Add posts anywhere on the page (top, bottom, middle). Filter by category, tag, and choose number of posts to show.
WooCommerce Extension which allows you to supply a literal message for out of stock products.