BBColors, CSS Syntax Checker for BBEdit and TextWrangler, Apache Configuration Language Module for BBEdit, bbdiff and the Tiger (i.e. Mac OS X 10.4) Details Report are all Mac-specific.

What? Every single one of those is Apple-related -- one is a low-level review of differences in 10.4, and all the rest were originally written as itch-scratching extensions for BBEdit, which is an ancient Mac-only commercial text editor, and his last day job was for the company that produced it as some sort of tech-support / help-writer.

I would say that they are BBEdit-specific, except for the review of differences on Tiger. That's only tangentially related to Apple. It's not like he wrote something for the iPhone and/or Mac.