I released rails-auth-github, which provides an easy way to add Github auth to Rails apps. It's not an alternative to omniauth, but a Rails equivalent of sinatra_auth_github.

In this article we describe how we make use of Rails tagged logging to create error messages that are more user friendly and easier for us to debug.

A quick guide for avoiding problems with setting up PDFKit on Heroku.

This gist lists all the changes in the most recent beta of Rails.