I've heard of memory scanners & cheat engines. The problem is that such an application requires huge amounts of time. I'd love to be able to have a plugin that could just pull data right out of memory, but if I wanted to go down that road I'd never be able to produce any other plugin at all.
On the other hand, if you know of a free, open source tool, perhaps I can look at the possibility of having lh_dataviewer exchange data with it.