If you have a Mac OS X Server laying around, its built in wiki is one of the best I've seen. If you want a WYSIWYG editor, Google Sites is a great choice. It's

If you have a Mac OS X Server laying around, its built in wiki is one of the best I've seen. If you want a WYSIWYG editor, Google Sites is a great choice. It's also very fast to switch between editing and view modes, etc. Other than that, I'd recommend Gollum, GitHub's open source wiki library. It has a very clean frontend, supports many different markup languages (like Markdown, Textile, Creole, etc), and pages and revision history are backed by a Git repository. It's as easy to setup as this: $ git init $ echo "Hello" > Home.markdown $ git add Home.markdown $ git commit -m "adding home page" $ gollum And open http://localhost:4567/ http://localhost:4567/ in your browser.