Thinkuknow - for advice about staying safe when you're on a phone, tablet or computer.
esafety - Australian site: learn about latest Games, Apps & Social networking sites, how to protect your information and where to get more safety guidance.
Teach ICT - "The site for ICT education" Resources for KS3, GCSE, AS & A level.
Codecademy - Learn to code interactively for free
CodeCombat - Learn how to code by playing a game
Code Club - start your own HE code club at home & download fun projects
W3schools - "The world's largest web development site"
Excel Easy - Free fully illustrated Excel tutorials (including VBA programming), plus 300 examples