I just released Footer Stuff through wordpress.org. Even though it’s a very simple (and lightweight) plugin, it’s not very easy to describe what it does. It offers you a way to add code to your blog’s footer an header sections, without having to edit your theme’s PHP files. Located under WordPress’ design tab it offers easy way of maintaining things like Google Analytics code, without being limited to just that one analytics system.
It’s here: http://wordpress.org/extend/plugins/footer-stuff.