Wetpaint+wiki

=Wetpaint - another wiki=

#3. Wetpaint wikis Wetpaint, like the other two big players, offer specials and specifics for educators.
====Wetpaint features ad-free education wikis, however if you click on the link to that feature wetpaint explains that this feature is no longer offered as of August 11, 2009. The reason? It was too expensive to administer, but you can purchase an educator plan that does have ad-free wiki space - that is the choice.====