We've started using openresty quite a bit in our shop. It's great for making certain things very fast. We looked at lapis, too, but it seems to be more than we need right now. Really, I'm afraid of doing too much complex development using a framework that doesn't provide you with an interactive debugger (like pdb).

Is there something out there that I'm not aware of? The following comment by the creator of openresty seems to indicate that there is not:

https://groups.google.com/forum/#!topic/openresty-en/VSIM8jY...