There’s an open source impl of an earlier version of K: https://kona.github.io/#/ https://kona.github.io/#/ There’s also a JS implementation that aims to impl

There’s an open source impl of an earlier version of K: https://kona.github.io/#/ https://kona.github.io/#/ There’s also a JS implementation that aims to implement K6: http://johnearnest.github.io/ok/index.html http://johnearnest.github.io/ok/index.html I don’t believe either implement all the “database” side of kdb+ though. Edit: The J language is similar in some respects, and is GPLed. They've also got a columnar database... http://www.jsoftware.com/jdhelp/overview.html http://www.jsoftware.com/jdhelp/overview.html