Found what looks like a great website for revision... You have to make an account but it's free and easy, and you then get access to a range of resources.
http://getrevising.co.uk/
Just out of interest, if you (like me!) are revising for the Edexcel History exam- War and the Transformation Of British Society- check this one out:
http://getrevising.co.uk/revision-cards/282622#1