Hiki is one of WikiWiki Web clone (Wiki Engine) written in programming language Ruby. WikiWikiWeb is web base collaboration tool. Hiki has following features:

* Simple syntax like original Wiki. * Theme function by CSS(Cascading Style Sheet). You can use a lot of tDiary themes (http://www.tdiary.net/theme.rhtml). * Plugin function, you can add various functions. * InterWiki support. * Categorize.