xmountains : opensource X11 fractal landscape generator
Open source X11 xmountains fractal landscape generator
If you'd to like to use xmountains and are using *buntu then just run synaptic package manager and type "xmountains" and then click install.
If you're using AnotherOs then I'd recommend either installing CygWin/X or using the VMware Player and then then unzipping the (Ubuntu) Browser Appliance virtual machine !