BrunoMiranda.com

“A wiki is a type of computer software that allows users to easily create, edit and link web pages. Wikis are often used to create collaborative websites, power community websites, and are increasingly being installed by businesses to provide affordable and effective Intranets or for use in Knowledge Management.” Wikipedia.org

As an alternative to backpackit, you can roll your own wiki if you already own a domain and hosting. Josh Owens developed an open source simple wiki called Sigal Wiki that is dead simple to setup. Dependencies include json, ruby-openid and redcloth gems.

It supports, openid, askismet spam filtering and private pages. I have deployed his wiki under my domain, check it out!

-Bruno