This is a freeware RPG system I came across somewhere. A strong point is the brevity of the rules, allowing for much improvisation and fantasy. The interesting thing about Imagnality is that it doesn't use dice - it uses a deck of playing cards. Each player is dealt a hand, and you can keep the high cards for times when you really need to succeed.

I'll add the url and credits as soon as I can borrow the copy again.