Updated PHP Function Reference Widget
I'm not a big widget fan, but this guy is really rather impressive. Yeah, it's as much that it's PHP, and I'm a big PHP fan, but it's a slick interface to the problem of a language that seriously needs a manual like this. One of the criticism of PHP is that there are so many functions that are database-specific (for instance). This makes one long for a more general function set.
But until then, this is a great little tool to look up the functions in a Dashboard widget.