Some useful tutorials that I appreciated and found interesting:
StackOverflow: Whenever you have a (good) question and need a (good) answer.
ped-net: should help people, who are interested in the field of pedestrian and evacuation dynamics, to find useful informations and to join other people with same interests.
Evacmod: This is the evacuation modelling portal for the simulation of human behaviour during emergency situations. The site is made by the evacuation modelling community for the evacuation modelling community.
A quick tutorial on Traits, Traits UI and Chaco: This tutorial begins with a quick introduction to Traits and then presents and discusses a simple application.
Action Script: Nice collection of ActionScript tutorials, code, videos and more. . .