Well,
my humble definition of "good" includes this one:
http://mtsdraw.mousetech.com
This is an open-source java (Swing) based attempt to provide an OS-independent equivalent to Microsoft's Visio program, since I found all the existing ones seriously lacking.
It's been stalled as of late, since both I and the other members of the team have been too busy to work on it, but if you're interested...
Some people, when well-known sources tell them that fire will burn them, don't put their hands in the fire.
Some people, being skeptical, will put their hands in the fire, get burned, and learn not to put their hands in the fire.
And some people, believing that they know better than well-known sources, will claim it's a lie, put their hands in the fire, and continue to scream it's a lie even as their hands burn down to charred stumps.