What it does: Adds a text link to JURN, placed just before the "more" button, on Google Search.
How it's used: A single click on the link then sends your search query to JURN, and searches across the full-text of millions of free academic articles, chapters and theses. JURN only searches free and open-access content.
Requirements: You will of course require a UserScript addon in your browser, to load this script.
More: More information about JURN can be found at the WordPress blog, including a full FAQ.