[development] What is the similiar Joomla-Mambot in Drupal?

[Drupal Indonesia]

I want to extend blogger.module with blogheader feature. What do I need is 
something like mambot in Joomla. The mambot can add on before/after a page.
So, when use click on http://localhost/drupal/blog/2 then the Blogheader (this 
is a new field on the user profiles) will be displayed on the top of this blog 
page.

I need any doc or link that can help me doing this task in Drupal. Better if oen 
can show me any Drupal module that work like mambot.

Regards.