Bitly is a (free or paid) service to shorten URLs, watch link statistics, and much more. The Bitly Connect plugin provides you with a custom Twig filter to shorten URLs, directly from your templates. The only thing you need to get it working, is a Bitly API access token (get one here).
Price includes 1 year of updates.
$9/year per site for updates after that.
To install this plugin, search for its package name on the Plugin Store and click “Install”.