Cappuccino has this neat feature of being able to use nibs that you create in Interface Builder by converting it to their own format cib (iirc for web optimization, at least I've noticed .cib filesizes in general be (significantly) smaller than their .nib counterparts, but this could be coincidental).

Normally you use a commandline tool called nib2cib for this which you had to execute everytime you changed your nib to get a corresponding updated cib. This arguably breaks the workflow a bit (it's pretty easy to forget to do a nib2cib after modifying your nib). The tool Klaas Pieter created aims to eliminate that extra step by watching your resources directory for changed nibs if I've understood correctly. Once it detects a changed nib it will run nib2cib for you on that nib for a fresh cib.

People are using a MacOS-only IDE to design web pages, and this is a tool that converts its output to the input expected by a js library (which I find lacking in producing interoperable hypertext) that implements a MacOS-like API.

Didn't know about this. I have thought about extending my example to run user defined commands on user defined files. Obviously someone beat me to it.

Thanks for the link.