LaTeX preprocessor for PDF generation; Rails plugin

kramdown-service gem - kramdown HTTP JSON API service (convert markdown to HTML or LaTeX)

Purge entries from a BibTeX file never cited by a given LaTeX file.

Sort the entries of a BibTeX (LaTeX bibliography) .bib file.

erbtex will act just like pdflatex except that it will process ruby fragments between {: and :} markers, greatly expanding the ability to generate automated TeX and LaTeX documents.