Vagrant is a tool for building and distributing development environments.

A foreign exchange rates and currency conversion API

A framework for creating e-books from Markdown using Ruby. Using the Prince PDF generator, you'll be able to get high quality PDFs. Also supports EPUB, Mobi, Text and HTML generation.

All of the code that runs on worldcubeassociation.org

Tinder Auto Like with Ruby - Applying A/B testing on human relationships

Bringing the management to the next level.