A great site full of customisable games like 'Who wants to be a Millionaire', a darts quiz and many more. Just download and change the questions and answers in the XML file.
http://ictmagic.wikispaces.com/Educational+Games
Apologies for the time you are going to spend on this one! This is a truly additive logic game where players have to guide falling sugar into cups. Great fun!
http://ictmagic.wikispaces.com/Educational+Games
A beautiful space science site. View a set of stunning flashcards about a variety of space topics. On other sections of the site to can view educational cartoon videos, worksheets and games.
http://ictmagic.wikispaces.com/Science