The q and k languages are part of the commercial Kdb+ array database that all the major banks use for rapid analysis. Seriously cool stuff and probably the state of the art in array programming. Kdb+ also has dashboards and other useful things. The original creator left to form his own company called shaktiDB, so that is another commercial product. Dyalog APL is the most advanced true APL out there. Unfortunately, you may notice a trend here that all the best tech in this space is currently commercial and closed source. That's a major deal breaker for some and for good reason.