pivotalexperimental's jazz_money at master - GitHub
Run your Jasmine specs without a browser
mynyml's holygrail at master - GitHub
The Holy Grail of testing for front-end development; execute browser-less, console-based, javascript + DOM code right from within your Rails test suite.
jbarnette's johnson at master - GitHub
Johnson wraps JavaScript in a loving Ruby embrace. It embeds the Mozilla SpiderMonkey JavaScript runtime as a C extension.