XELand generates night landscapes as stereo pairs for cross-eye viewing. Currently it uses two map generation methods (plus some variations). Generated height maps are seamless and can be saved as PNG images. The program requires only JDK 1.5 or above, and is very easy to use. To take full advantage of XEland you should learn cross-eye viewing.
Pulga is a program for numerical simulation of dynamical systems. It is designed to provide a way for students and researchers who study dynamical systems to model them on a computer and analyze them numerically without the difficulty of traditional computer programming languages.