Bookmaker provides authors a free, ruby-based production toolchain for self-published paper and electronic books using the LaTeX document preparation system.

http://devel.softeng.ox.ac.uk/trac/softeng/wiki/Utilities/RakeLatex

My default setup for writing text documents, utilizing pandoc, erb, markdown and latex

Scrapes a story off FF.net, converts it to Markdown, and turns it to PDF with LaTeX

Translate MathML to LaTeX

A Ruby gem to create a skeleton for a LaTeX document.

Ruby DSL for LaTeX

Image generator for LaTeX/Graphviz source

Gem for creating a LaTeX expressions from JavaScript ones.

A Lita handler for rendering LaTeX

LaTeX Project Build Tool

hatena to Latex

Compile ruby into latex.

Vanilla brings Markdown like features to LATEX

A library that aims to simplify the process of turning fragments of LaTeX into images and other formats.