Geddy - A modular web framework for node.js

Someone with more insights reading this?

Usefulness can also be measured in viewing the source code to see how its structured.

And while (fab) is interesting conceptually, its syntax doesn't lend itself to easy understanding of which parts have a single, double, or ternary arity. Since it's basically chaining functions, the syntax highlighter can't tell the difference between the different parts w/ different arities.

Josi works pretty much as expected, especially if you're familiar with Sinatra. However, what doesn't make sense about it at all is that the http response is expected as a return from the controller methods. That doesn't make sense at all, since in order to take advantage of node's asynchronous nature, your database calls also need to be asynchronous--and this is usually done through anonymous function callbacks. I think this is the most important aspect to watch out for in the node.js frameworks.

Express doesn't suffer from this problem, and it also uses the Connect middleware. So far so good, and it's small enough that it's understandable.

I haven't checked whether any of these frameworks pollute the global namespace, but it doesn't seem like a problem yet.

You should find the one the best suits what you want to do, but also encourage others so as to avoid a monoculture.

Having multiple communities exploring different ideas is a Good Thing.