BrainKeeper | Provides knowledge management tools. Prices based on the number of log-ins required.
ClearWiki | A hosted wiki that enables users to search within common file types like PDFs.
EditMe | Hosting service provides custom wikis for a monthly fee but no marketing services.
Paux | Free, Java-based open-source software that is similar to a content management system.
MediaWiki | The free software Wikipedia uses for its websites boasts lots of features and can support high traffic.
MoinMoin | Another free application. Users can get help from MoinMoin developers.
Socialtext | Provides “wiki appliances,” or dedicated boxes, for deployment at customers’ sites as well as hosting wikis in the company’s data center for a few dollars per user per month. Services include marketing the wiki to users.
StikiPad | Simple enough for small-scale purposes but can be customized for big projects. Price is based on
storage capacity, with an entry-level allocation of 30MB available for free.
Wetpaint | A free hosted wiki that’s easy to learn and edit. Some wiki users say it’s good for first-timers.