Hi,

I made a google code project for 2D path-finding and lighting:
https://code.google.com/p/straightedge/

Here's the web start demo:
http://www.keithwoodward.com/straightedge/straightedge.jnlp
Left click or WASD/arrow keys to move, right click to shoot, N to change map, V to change view.

There's a thread here about it too:
http://www.javagaming.org/index.php/topic,23427.msg194013/topicseen.html#msg194013

Cheers,
Keith