World Gen Test
This was my first real try doing any kind of procedural generation. It was exceedingly simple: take some perlin/simplex noise (I forget which I used at the time) and use that to generate a map.
Here's some further-along attempts. Really, it's nothing more than colors based on the heightmap the noise generates, plus another noise map for, I believe, temperature.
That is, unfortunately, as far along as I got. It was fun to mess around with, but nothing spectactular, and could hardly count as a game.