PBworks
Used by 2 peoplepbworks.com ↗

“I also use PBWiki for my course wikis.”
Jessica Hammer Interview, Game psychologist, designer · via Uses This 
“I'm a bit of a wiki addict, so PBworks helps me manage everything my life: documentation, projects, finances, ideas, health tracking, etc.”
Ariel Waldman Interview, Space hacker · via Uses This