A modern programming language that makes developers happier.

kotlinlang

I kinda like query parameter with the :parms and not at the same time.   If using lambdas it is ok, but still doubles up saying what is coming in (declare in the route and declare in the code), and not sure if they do optional or mandatory when declared.

I like the exception helpers and returning natural objects (in Kovert we don't every return anything other than your own objects).  I think their Payload seems to return the http status code, anything else is your own object.  

It is also similar to Kovert in how it decides what to do with the returned objects, string = html, object is json via jackson, Model / ModelAndView is as I documented in the comments to you first talking about kovert.  

I could easily do Kovert binding on top of this library and even take code out since it handles many things the same way.  

very similar but it is the full stack, not just the "last mile" that kovert is.