At Braintree, we play ping pong in the office. We wanted a way to track results and assign ratings to players. Elovation was born. It's a simple rails app that tracks the results of any two player game and assigns ratings to the players using the Elo rating system.
Elovation is optimized for deployment on Heroku. Because the app doesn't provide any authentication or authorization, you can turn on basic auth by setting some environment variables in your heroku app.
heroku config:add BASIC_AUTH=true BASIC_AUTH_USER=username BASIC_AUTH_PASSWORD=password
After pushing the app to heroku, just run the migrations and you're all set.
heroku run rake db:migrate