If someone points out to you that your pet theory of the universe is in disagreement with Maxwell's equations-then so much the worse for Maxwell's equations. If it is found to be contradicted by observation-well these experimentalists do bungle things sometimes. But if your theory is found to be against the second law of thermodynamics I can give you no hope; there is nothing for it but to collapse in deepest humiliation.
A project to put my lecture notes online. The material broken up into small chunks with interactive simulations and solved problems.
An open source mindmapping application.
An open and extensible reference manager that is in development.