How to create a module for Joomla 2.5

We can create our own module for Joomla 2.5 CMS by writing our own code we follow the following procedure:

1. Decide a name. All modules start with mod_

   ( e.g : mod_mymodule )

2. create a directory (eg mod_mymodule) the following files:

    index.html

    helper.php

    mod_mymodule.xml

    mod_mymodule.php

   \tmpl\default.php

   \tmpl\index.html

Full article in http://developerpages.gr/index.php/web-development-2/cms/joomla/112-how-to-create-a-module-for-joomla-2-5