OK, I've always known about this Smalltalk environment and have played with it on occasion. For some odd reason, I thought I would fire it up and look at it. Well, little did I know it has embedded Java, Lisp, and Prolog inside of it! Very cool integration as well! The interface is pretty slick and is cross platform. These guys have been working really hard on this product. Very impressive! So, what are you waiting for? Go check it out: Smalltalk/X.