Rouge is a pure-ruby syntax highlighter. It can highlight over 60 languages, and output HTML or ANSI 256-color text. Its HTML output is compatible with stylesheets designed for pygments.

Here the list of the supported languages and lexers. Feel free to write your own submitting a pull request ! Contributions are welcome.

Note that the canonical, always-up-to-date list of lexers can be found by running rougify list.

• apache: configuration files for Apache web server
• applescript: The AppleScript scripting language by Apple Inc. (http://developer.apple.com/applescript/) [aliases: applescript]
• c: The C programming language
• clojure: The Clojure programming language (clojure.org) [aliases: clj,cljs]
• coffeescript: The Coffeescript programming language (coffeescript.org) [aliases: coffee,coffee-script]
• common_lisp: The Common Lisp variant of Lisp (common-lisp.net) [aliases: cl,common-lisp,elisp,emacs-lisp]
• conf: A generic lexer for configuration files [aliases: config,configuration]
• cpp: The C++ programming language [aliases: c++]
• csharp: a multi-paradigm language targeting .NET [aliases: c#,cs]
• css: Cascading Style Sheets, used to style web pages
• CowScript: a lexer writing in C# (https://github.com/Jugolo/CowScript)
• dart: The Dart programming language (dartlang.com)
• diff: Lexes unified diffs or patches [aliases: patch,udiff]
• elixir: Elixir language (elixir-lang.org) [aliases: elixir,exs]
• erb: Embedded ruby template files [aliases: eruby,rhtml]
• erlang: The Erlang programming language (erlang.org) [aliases: erl]
• factor: Factor, the practical stack language (factorcode.org)
• gherkin: A business-readable spec DSL ( github.com/cucumber/cucumber/wiki/Gherkin ) [aliases: cucumber,behat]
• glsl: The GLSL shader language
• go: The Go programming language (http://golang.org) [aliases: go,golang]
• groovy: The Groovy programming language (groovy.codehaus.org)
• haml: The Haml templating system for Ruby (haml.info) [aliases: HAML]
• handlebars: the Handlebars and Mustache templating languages [aliases: hbs,mustache]
• haskell: The Haskell programming language (haskell.org) [aliases: hs]
• html: HTML, the markup language of the web
• http: http requests and responses
• ini: the INI configuration format
• io: The IO programming language (http://iolanguage.com)
• java: The Java programming language (java.com)
• javascript: JavaScript, the browser scripting language [aliases: js]
• json: JavaScript Object Notation (json.org)
• json-doc: JavaScript Object Notation with extenstions for documentation
• liquid: Liquid is a templating engine for Ruby (liquidmarkup.org)
• literate_coffeescript: Literate coffeescript [aliases: litcoffee]
• literate_haskell: Literate haskell [aliases: lithaskell,lhaskell,lhs]
• llvm: The LLVM Compiler Infrastructure (http://llvm.org/)
• lua: Lua (http://www.lua.org)
• make: Makefile syntax [aliases: makefile,mf,gnumake,bsdmake]
• markdown: Markdown, a light-weight markup language for authors [aliases: md,mkd]
• matlab: Matlab [aliases: m]
• moonscript: Moonscript (http://www.moonscript.org) [aliases: moon]
• nginx: configuration files for the nginx web server (nginx.org)
• nim: The Nim programming language (http://nim-lang.org/) [aliases: nimrod]
• objective_c: an extension of C commonly used to write Apple software [aliases: objc]
• ocaml: Objective CAML (ocaml.org)
• perl: The Perl scripting language (perl.org) [aliases: pl]
• php: The PHP scripting language (php.net) [aliases: php,php3,php4,php5]
• plaintext: A boring lexer that doesn’t highlight anything [aliases: text]
• powershell: powershell [aliases: posh]
• praat: The Praat scripting language (praat.org)
• prolog: The Prolog programming language (http://en.wikipedia.org/wiki/Prolog) [aliases: prolog]
• properties: .properties config files for Java
• puppet: The Puppet configuration management language (puppetlabs.org) [aliases: pp]
• python: The Python programming language (python.org) [aliases: py]
• qml: QML, a UI markup language [aliases: qml]
• r: The R statistics language (r-project.org) [aliases: r,R,s,S]
• racket: Racket is a Lisp descended from Scheme (racket-lang.org)
• ruby: The Ruby programming language (ruby-lang.org) [aliases: rb]
• rust: The Rust programming language (rust-lang.org) [aliases: rs]
• sass: The Sass stylesheet language language (sass-lang.com)
• scala: The Scala programming language (scala-lang.org) [aliases: scala]
• scheme: The Scheme variant of Lisp
• scss: SCSS stylesheets (sass-lang.com)
• sed: sed, the ultimate stream editor
• shell: Various shell languages, including sh and bash [aliases: bash,zsh,ksh,sh]
• slim: The Slim template language
• smalltalk: The Smalltalk programming language [aliases: st,squeak]
• sml: Standard ML [aliases: ml]
• sql: Structured Query Language, for relational databases
• swift: Multi paradigm, compiled programming language developed by Apple for iOS and OS X development. (developer.apple.com/swift)
• tcl: The Tool Command Language (tcl.tk)
• tex: The TeX typesetting system [aliases: TeX,LaTeX,latex]
• toml: the TOML configuration format (https://github.com/mojombo/toml)
• tulip: The tulip programming language http://github.com/jneen/tulip [aliases: tlp]
• vb: Visual Basic [aliases: visualbasic]
• viml: VimL, the scripting language for the Vim editor (vim.org) [aliases: vim,vimscript,ex]
• xml: XML
• yaml: Yaml Ain’t Markup Language (yaml.org) [aliases: yml]