Sanjay Kapoor, a Chicago based serial entrepreneur and now consultant in computing applications, was in Paris a few weeks ago. He discusses Ruby and its framework “Ruby on Rails”, created by these guys, which benefit from a growing popularity. As PHP and Java, Ruby allows to develop quickly. Many start-ups are considering Ruby and ROR to develop their applications because it speeds up time-to-market. Sanjay explains why the momentum is gaining, including in France where “Paris on rails” will be hold this year again after last year’s success.