This is a minimal Ruby command-line app which generates Github Issues from Trello cards. Currently lacks help, error handling, intelligent argument parsing, modularity, and so on.
Just rename config_example.yml to config.yml and fill in your own values.
ruby trello_github.rb <trello_card_url>
trello_card_url is the URL shown in the URL bar when a card is displayed. It
should look something like https://trello.com/card/name-of-card/4f1836c0c3c5f3d82f08e4bd/77.