Publisher is the only multilingual and workflow module for ExpressionEngine.
A simple accessory that turns the 'Pages URI' field on the publish page into an autocomplete text input.
Helps users generate a Pages Module URI by allowing them to generate a Page URI by selecting a parent page and automatically pulling the URL Title from the entry.
Purge is an extension for that sends a purge request to the Varnish caching proxy upon entry submission/deletion. This allows you to keep objects in the cache longer while still being able to keep your site up-to-date.
Publisher Lite is the workflow only version of Publisher. It does not support multiple languages, but you get all the other benefits of Publisher.
Project Cerberus is an antispam webservice specifically targeting ExpressionEngine member profile spam.