Testing
Agilstry - Elisabeth Hendrikso’ns site for all things test (including a great interactive example of the Myers Triangle problem)
Development
Quackit - “teaches beginners how to create websites”
Coding For Kids - ” finding ways to support education of programming and computational thinking for the current and next generations in the UK”
Codeacademy - Learn Java Script through online interactive exercises
Learn Python - collection of sites containing interactive exercises for learning Python in the cloud
Rob Lamberts post on Testers Learning to code - contains some useful links for learning various languages
Security
Software Testing Club Security Group