"The Best Collaborative Wiki You've Ever Seen" - that is how cctext is promoted.
- Powerful Markup/Editor
- Rich Content Sharing
- Access Controls for users
- Friendly to Google Apps users
Pricing is $4 per user per month, and the first 10 UMs(user-month) are free.
60+ wiki tools here
[via FeedMyApp, Killer Startups, etc]