Dan North created a BDD framework, JBehave, followed by a story-level BDD framework for Ruby called RBehave which was later integrated into the RSpec project. He also worked with David Chelimsky, Aslak Hellesøy and others to develop RSpec and also to write "The RSpec Book: Behaviour Driven Development with RSpec, Cucumber, and Friends". The first story-based framework in RSpec was later replaced by Cucumber mainly developed by Aslak Hellesøy. Capybara, which is a part of the Cucumber testing framework is one such web-based test automation software.