In my organisation, we use CA Agile central for managing the process. It is one of the most detailed and feature rich platform for agile teams and managing Kannan boards that I know of. However, I am not a great fan of it. Personally, I would incline towards Trello
CA Agile central (their website says that it's renamed to Rally), same as Jira, looks like a very enterprise solution focusing on big teams/companies. Trello (at least its free version) is oriented on (relatively) small projects I think. They don't have features to track milestones and overall progress, for example. At least, I'm not aware of them...
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.