Mazes in general (and hence algorithms to create Mazes) can be organized along seven different classifications. These are: Dimension, Hyperdimension, Topology, Tessellation, Routing, Texture, and Focus.
This site contains Darwin's complete publications and many of his handwritten manuscripts. There are over 50,000 searchable text pages and 40,000 images. There is also the largest Darwin bibliography and the largest manuscript catalogue ever published
covers various attempts to describe RPGs in general terms. There are many sources for advice on role-playing games, but most of these try to promote a "One True Way" of playing. Rather than telling you how to roleplay, this is a collection of articles