best ASCII RPG ever for hard core RPG lovers, a roguelike game which means that it is a single-user game featuring the exploration of a dungeon complex
Biomimicry & Taxonomy. "Nature's elegant solutions to building challenges include the Scots pine's adaptive growth, the thorny devil's passive water collection, and a leaf's on-site energy production. AskNature can help you solve your design challenges. "
B-Trees are often mentioned as a good way to store and retrieve data, especially to and from disk. They're efficient to use and easy to program, and they're often mentioned but not-so often discussed. They show up all over the place.