Sites like

anonib.se
Alternatives

Pbwiki.com

Capture knowledge, share files, and manage projects within a secure, reliable environment | PBworks - Online Team Collaboration Software

PBworks lets your team capture knowledge, share files, and manage projects. It tracks every change, and automatically notifies you and your team to keep everyone in the loop. PBworks is secure, reliable, and accessible from any computer or mobile device, so your team can use it anywhere they go. You can even use it with clients or partners. And because it's hosted, you don't need to download any software or manage any servers.