Today I released Add user frontend V1.3.1.  Add user frontend  is a joomla component which makes it possible to add users to Joomla from the frontend.

New in version 1.3.1:

- We have created a better double username routine. The addition to the username when it already exists will be numeric and ascending in this version and in the following AUF versions.

Download it here:
http://www.ghanja.be/en/downloads/components/add-user-frontend/details.html