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CLiki is an open source wiki application written in Common Lisp, that was under development from 2002 to 2005.

CLiki was first presented at the International Lisp Conference 2002.^[2][3] CLiki was the first wiki variant to introduce so called "free links", using the _(free link format) as an alternative to the much-criticized CamelCase.^{[citation needed]}

The CLiki program is free software licensed under the MIT license. It runs under SBCL and uses the Araneida Common Lisp web server.

CLiki also operates a homepage using the software that is dedicated to the subject of Common Lisp.

Since 2011, a new version of Cliki (named Cliki2) was developed by Vladimir Sedach and Andrey Moskvitin,^[4] with major features around spam prevention. Other major features are:

• Araneida was replaced with Hunchentoot
• Real article deletion and undeletion
• Code coloring using cl-colorize
• Working list of uncategorized/orphan articles
• Pages that work well in text browsers (and hopefully screen readers)

• CLiki