Anon_nodecreate is a project mainly written in PHP, it's free.
Allow anonymous users to create nodes in drupal page with an option of registering or logging into the site in the node form. Thus the created node's author is either the newly created or the logged in user.
This Drupal module allows anonymous users to post content with a user-login/register form attached to the node form. Hence the node created is either attached to the newly created user or the logged in user.