I've written a new block for the welcome pages, which displays pretty charts using "Google Charts". These are "eye candy" rather than serious genealogical tools, but they can easily brighten up a dull welcome page.
The google-charts API is fairly well documented, so it should be straightforward to add all sorts of pretty charts.
I've written two so far; global individual distribution and surname distribution. They look this: (apologies if the long URL stretches the screen)
To use, just save the attached file in your /blocks/ directory.