The World’s Shortest WordPress Plugin

We’ve been doing some seriously cool stuff with Barry of late but it’s been pretty chunky too and, in between mountains of code, decided it was time to clear the decks… get seriously Zen and look to the simple in life.

So, Barry challenges you to declare:

What’s the shortest, yet most useful, WordPress plugin (WP and/or WPMU) you’ve come across or can write yourself?

Length is measured from the start of the actual code, to the end (no need to count the bumpf up top), and quality is rated by usefulness, coolness and general bestness.

Make your submissions (your own, or other peoples plugins) in the comments! May the briefest win!