Полезные модули для Drupal 7

Регистрация и профиль пользователя

Profile2

user registrationpassword
Email_registration - Allow users to register using only an email address, ie. without username.
http://drupal.org/project/logintoboggan
http://drupal.org/project/captcha_pack
http://drupal.org/project/terms_of_use
http://drupal.org/project/hidden_captcha
http://drupal.org/project/service_links
http://drupal.org/project/loginza

Интерфейс

http://drupal.org/project/toolbar_hide