What's the name of this hard to search for module?

Hi There -

Have tried searching up and down for this one module that allows you to omit the $base_path variable and start your urls with /. It's difficult because the combination of words is so common.

so instead of
<img src = "<?php print $base_path ?>/my/path/here" />

I can write
<img src = "/my/path/here" />

Someone installed it on a previous project and life was so much simpler. Now I'm on my own and I'd like to use it.

Anyone know?