Developer Arsonide is well known for creating the very useful Perlin Noise plugin. Now he took the concept to a whole new level with the Noise 2.0 plugin, which includes awesome stuff like ridged multifractal noise, voronoi noise, planatery noise, color mapping, lighting and even integrated camera controls!
So apparently this opens a whole lot of new possibilities for creating procuderal game content. Think about entire universes created by this wonderful plugin. Hot damn!
Go ahead, learn all the details and download Noise 2.0 in the official thread.
Oh, and if the plugin proves useful to you and you'd like to support the developer, you should consider donating.