Amitai Schleier has contributed code to ikiwiki...
...and uses ikiwiki for all sorts of things:
Public
- My personal web site
- A very small podcast
- A major open-source project's wiki (with the cvs plugin)
- An undergraduate group's university-provided-static-hosted site (with rsync and a WIND authentication plugin)
- A small personal site
- A wiki about Agile in distributed teams
Non-public
- On my laptop, personal to-do and scratch space
- A small personal site
- At a previous job, team documentation and project planning: product and sprint backlogs, burndown charts, release plans/procedures/announcements, aggregating feeds of shared interest, etc.