kona. Kona is an open-source implementation of the K language (K3.2). K was originally designed by Arthur Whitney and Kx Systems. Kona is unaffiliated with Kx. The K language is a precursor of KDB, KDB+, and Q. It is an ASCII-based array language. See the intro screencast: http://www.youtube.com/watch?v=bmiq47E5N-w Screencast on MapReduce: http://news.ycombinator.com/item?id=2286329