For a free extension you really can't ask for more than QContacts gives. Wonderful import from default Joomla contacts feature is a huge time saver! Very customizable (the default CSS file will require some padding applied). Integrated CAPTCHA is good. Still playing around with this one but it looks almost perfect for what I need.

Works perfectly! Unbelievable how difficult it is to determine the URL of an article for which a menu item has not been created - until Linkr!

This is a very nice module but the non-popup version (1.0) doesn't appear to work. Super simple setup.