Sometimes you just want to do something simple, and there doesn’t seem any way of achieving it easily. Then you find something like AddHeader.
This one adds the contents of your specified file into the header of your pages, so you can add or remove code without having to go and edit the template files (and it’s there regardless of which template you’re using too!). Simple.
Version 0.1.0 (Initial Release August 2009) : AddHeader module