There is a trial version of q (a newer k variant) at the Kx website, and a couple of us are also working on Kona, an ISC-licensed k-like language, at http://github.com/kevinlawler/kona .
The k way of doing things is indeed eye-opening. There is some documentation for Kona on its github wiki page, and Hakan has an extensive set of k resources at http://www.hakank.org/k/.
The k way of doing things is indeed eye-opening. There is some documentation for Kona on its github wiki page, and Hakan has an extensive set of k resources at http://www.hakank.org/k/.