Eton Fives is squash for those who can't afford raquets..
It's an extremely old game similar to squash played wearing gloves. Only a few private schools still play it.
Here's some quick info about the game: http://www.etonfives.co.uk/about.fives/faq.html
here's my old school where we played: http://www.kes.bham.sch.uk/prospectus/etonfives.html