Fast and easy syntax highlighting for selected languages, written in Ruby. Comes with RedCloth integration and LOC counter.

Rouge aims to a be a simple, easy-to-extend drop-in replacement for pygments.

Ruby wrapper for pygmentize.

Highlight highlights code in more than 20 languages. It uses the Pygments syntax highlighter and adds a simple Ruby API over it. It also provides helpers for use in your Ruby on Rails views.

Harsh: Another Rails Syntax Highlighter. Ultraviolet-based syntax highlighting for rails, for ERb or Haml. Better than the rest.

Converts source code into a (bookmarked, themed, and syntax highlighted!) PDF.

Ultraviolet syntax highlighting gem for Ruby18 and Ruby19

Rack middleware used to automagically format your code blocks using pygmentize

web service for formatting text with the ultraviolet lib. ruby 1.9 only

Ink is a wrapper for Pygments, a nice Python syntax highlighting library and formatters like RDoc, Markdown and Textile.

This Rack middleware component uses the CodeRay gem to automatically format code syntax by detecting a specific container in the final rendered markup.

Albeano lets you to write language specifics code snippets within text and returns Pygments generated HTML syntax highlighted code

a gem to get syntaxhilight via ultraviolet

jQuery.Syntax is a light-weight client-side syntax highlighter.