http://help.joomla.org/ghop/feb2008/task048/joomla_15_quickstart.pdf

Addons for Gallery and Joomla - Media Gallery Feature Comparison

http://www.gallery-addons.com/Gallery-Addons/Component/Media_Gallery_Feature_Comparison/

http://www.bretteleben.de/lang-en/joomla.html

http://support.joomlatools.eu/

http://easy-website-design.com/