URL : https://github.com/vendethiel/icy_phoenix_plugin_skeleton
This is a plugin skeleton to start your own plugin. You just need to replace every occurence of "myplugin" (or "MYPLUGIN") with your plugin name.
This file structure only uses a root file : myplugin.php. It then dispatches to the correct plugins/myplugin/pages/{$page}.php file. The default template file is plugins/myplugin/templates/default/{$page}_body.tpl. You can change the $template_file variables inside your page to tune that.