Mephisto—The best blogging system ever
SimpleLog. A simple (and free!) Ruby on Rails weblog application.
The simplest CMS you'll ever use @ Pagety
Then as they get even more advanced, they write bug tracking software:We make bug tracking easy @ 16bugs.com
Porchlight - Bug tracker for small software development teams
This isn't meant to be a critique or anything but I suppose it shows some kind of evolutionary path they take. Or maybe it's just a funny coincidence.
I think the blogger thing and the bugtracker thing show that coders don’t really have the tools they need. They want to be able to document and track, and most of the tools out there are pretty heavyweight.