Updated: here are a couple I missed the first round.
This is an IBM deal - they are hungry to get into this here cloud stuff. Not a bad looking offering. They have a handy calculator to let you see how you can slice and dice resources.
SAP (who - I confess - gives me the willies) has a free perpetual developer account which they inform you in BOLD type is Not For Productive Use. I'm not interested, but maybe you are...
Rapid Application Development for Enterprises. No experience with this one but it sounds intriguing. No credit card needed so what have you got to lose?