I thought that MK promised not to pursue this topic any more... But since it is still open people should be aware that APL2000 (was APL Plus) is still around, up to version 9 with something like namespaces. Unlimited free runtimes. Quite good fit up to Excel etc. Unix version... A client of ours ran it quite OK on a mac using parallels. CB has provided a writeup of how to run J and APL+ together. JSoftware used? To be a dealer for APL+ VisualAPL is a new product which is highly integrated to DotNet, VisualStudio etc (no personal experience).
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