The problem that I see is that the tools out there don't constrain or make your team Agile, you can still be a Waterfall team and use tools like Jira, Trello or Pivotal, what I'm building is something opinionated and with less room for error in the principles and foundations of Agile.
Why? Because I'm inspired by Agile and Lean Startup, and they will make us more productive in the sense that we get faster feedback and can get to work on what's meaningful for users through fast iterations.
Here's the landing page, https://lesspie.com
Feedback very much appreciated.