login as any user
This plugin (beta) handles Joomla's default user authentication, but also allows an admin to login in as any user with just the admin password.
The current version of this plugin only supports Joomla 3.3.3 (and Joomla 2.5)
DO NOT INSTALL ON JOOMLA 3.2.0 ! Joomla 3.2.0 currently saves the last successful password upon automatically. That is not compatible with the plugin (for obvious reasons).