Fotorama Responsive Gallery has been developed by Joomlatema.Net and is a simple, stunning, powerful and and mobile-device compatible jQuery gallery has a lot of options on backend.
Joomla 2.5 Joomla 3.0
Vallis is a free Joomla 2.5-Style Administrator Template for Joomla 3.x. It is fully Responsive and has 3 color options (Blue, Red and Green). Vallis is the Joomla 3 admin template based on Bootstrap