> give J (an APL descendant) a try, J is not open source. Might be a factor to consider. From the J site, "Jsoftware licenses source for all the Jsoftware bi

> give J (an APL descendant) a try, J is not open source. Might be a factor to consider. From the J site, "Jsoftware licenses source for all the Jsoftware binaries. There are several factors in determining the cost of source licenses. Primary is the source itself: J Engine (portable C); Windows GUI support (C++); and Unix GUI support (Java). Secondary is the scope of use: internal; distributed products; and competitive (to Jsoftware) products. And finally the platforms: Windows; Unix; PocketPC; etc. The price range is from $10,000 to $400,000. Regular updates to our current source levels are available for separate update fees."