calendar computations according to the Roman Catholic liturgical calendar as instituted by MP Mysterii Paschalis of Paul VI (1969) and defined in General Norms for the Liturgical Year and the Calendar and other documents of liturgical legislation.

isodoc converts documents in the IsoDoc document model into Microsoft Word and HTML. This gem is in active development.

Metanorma for UN documents. Formerly known as metanorma-unece

Metanorma for UNECE: United Nations Economic Commission for Europe.

Ruby toolbox for manipulating DjVu files.

This gem provides a ruby cli http wrapper around the perseus CTS API and its xmlmorph apis

Book boilerplate to generate books as EPUB, MOBI, and PDF from simple Markdown text files. Or from HTML. Or from LaTeX. Or mixed.

Rticles is a Rails plugin that allows for web-based editing of legal documents. It lets you create nested, numbered paragraphs, along with intra-document references that remain accurate as paragraphs are inserted, removed and moved.