I use RoadRunner for that purpose. It even has some amazing features you can enable as keeping the application loaded in memory between requests.

https://roadrunner.dev/

I Use Gnome 3 with i3 as window manager at work and Unity at home.

I would use it if I could host it on my own server and run it on top of Gmail using IMAP and Postgres as a cache.

I could pay 30-50$ for it, but I think this would be even more awesome as an OpenSource solution, your product rocks compared to other alternatives as SquirrelMail, and you can always offer a hosted plan as a way to make money from it.

Does anybody knows which is the javascript interpreter he is using on the screencast?

It's jsc (comes with Webkit) - it's present on Mac OS X by default in

/System/Library/Frameworks/JavaScriptCore.framework/Versions/A/Resources/jsc

You can just do:

sudo ln /System/Library/Frameworks/JavaScriptCore.framework/Versions/A/Resources/jsc /bin/jsc

To be able to invoke it directly from the command line.

That is extremely useful. Do you know if any testing libraries or other useful functionality have been built around this?

I suppose if you are a WebKit-only developer, this utility could have many useful applications.

There's also mozrepl, which lets you evaluate code in Firefox from the command-line or Emacs.

Thanks, I'll look how to get this working on linux.

At least Arch has `js`package which gives you js command to obtain JS shell; in fact it is just Mozilla's SpiderMonkey. Anyway, the best option for "standalone JS" is node, mainly because it has a sane way of importing code from other files.

Alternatively, you could use Rhino Shell (https://developer.mozilla.org/en/Rhino_Shell) - it even supports tab completion!

My Chrome install on Windows has the same thing. I push ctrl+shift+c to load the developer tools, and click on console and it's a very similar tool to what he was using.

<shamelessplug>If you want to use any of these inside emacs check out my js-comint mode: http://js-comint-el.sourceforge.net/ Makes it really easy to do things like write code in one buffer and execute it in another. </shamelessplug>

Looks like something that comes as part of Webkit:

http://trac.webkit.org/wiki/JSC

> Attempts a comparative analysis of experience with different tools both as a "developer" and a "designer" without explaining the significance of either term; what's a "Photoshop CS5 Developer" or a "Textmate Designer"?

It's an interpretation error, the bars indicate expertise and frequency of use (shown below).