I just released a new ExpressionEngine add-on called PathFinder. It allows you to configure ExpressionEngine to automatically perform an HTTP 301 redirect when the URL slug (url_title) for an entry is changed.
Want to allow content editors to change URL slugs for SEO purposes or to match changes in entry titles, without losing existing search engine ranking as a result of changing the URL, and without needing a developer to setup a redirect? That’s one of the use cases this add-on can serve.
The add-on is available for purchase on devot:ee.