kramdown is a fast, pure Ruby Markdown superset converter, using a strict syntax definition and supporting several common extensions.

Advanced command line parser supporting nested commands

Additional functionality for the HexaPDF library

webgen extension for converting text emoticons into image emoticons

Versatile PDF creation and manipulation for Ruby

Versatile document creation markup and library

Implementation of some HexaPDF algorithms in C for still more performance

webgen is a fast, powerful and extensible static website generator

Objects and Algorithms for 2D Geometry in Ruby

webgen extension bundle for Tipue Search javascript site search engine