What are all the Node web frameworks that are being actively developed? Here are the ones I could find:

http://github.com/thatismatt/josi http://github.com/visionmedia/express http://github.com/mde/geddy

These ones haven't seen commits in over a month:

http://github.com/obt/bomberjs http://github.com/simonw/djangode

There are also Fab.js http://github.com/jed/fab (which hasn't seen any updates in a while, but I'm sure it's still being worked on), Pintura http://github.com/kriszyp/pintura and Picard http://github.com/dantebronto/picard

At a lower level of abstractions are the middleware layers Connect http://github.com/extjs/Connect and JSGI http://github.com/kriszyp/jsgi-node

Both Node.js and Tornado seem to have scaled for real-time-web stuff in the past:

http://news.ycombinator.com/item?id=1088699

http://friendfeed.com/

I think I'd try Tornado first myself because of Python's error tracebacks. In my opinion they make debugging significantly easier.

Is there any other software in this space?

The example code is a bit unreadable for me: http://i.imgur.com/uMcgo.png

Yea they really need to change the background behind the code. There are so many new frameworks with unknown user bases and support out there that their website design can be the difference between getting users or not.

This doesn't look much different from existing frameworks like Express. I wonder what distinguishes the project?

Express is closer to Sinatra than to a MVC, that's for me is the only difference.

It's built on Node.js, which is supposed to make real-time web stuff easier.

So is Express http://expressjs.com/

Another?... Don't get me wrong, it looks somewhat better than the other frameworks I guess, but really?

I understand that the node community is still very young but hopefully they'll start consolidating around some of the core libraries/frameworks pretty soon. For example, I haven't seen a consensus for the best testing or packaging libraries.

There will be many more. At least until something decent comes out.