Nathan Geffen's website

Simulations

Introduction to modelling epidemics and infectious diseases
Why don't dangerous animals often kill each other when competing for mates? A simulation of how non-lethal agonistic behaviour evolves.
Balls on a plane
Graphical implementation of the Prisoner's Dilemna game that Robert Axelrod and Douglas Hofstadter wrote elegantly about in the 1980s. (Github repo - implemented in old version of Qt. No idea if it still works.)

Miscellaneous

Archived Treatment Action Campaign website as of October 2008
Space travel calculator: Find out how long it will take you to get to various planetary and interstellar vacation spots.
Quackdown: retired website that used to debunk nonsense
Selected reading following the events in Israel, Gaza and the West Bank of 7 October 2023
South African Human Rights Delegation to Israel and the Occupied Palestinian Territories 2008

Mutterings