Redmine

    <p>Default code highlightment relies on <a href="http://coderay.rubychan.de/" class="external">CodeRay</a>, a fast syntax highlighting library written completely in Ruby. It currently supports c, clojure, cpp (c++, cplusplus), css, delphi (pascal), diff (patch), erb (eruby, rhtml), go, groovy, haml, html (xhtml), java, javascript (ecmascript, ecma_script, java_script, js), json, lua, php, python, ruby (irb), sass, sql, taskpaper, text (plain, plaintext), xml and yaml (yml) languages, where the names inside parentheses are aliases.</p>

<p>You can highlight code at any place that supports wiki formatting using this syntax (note that the language name or alias is case-insensitive):</p>