I was making a collection of products I actually use on a daily basis and searched for pivotal. It wasn't here yet. Can't believe it.
Our team uses Pivotal not only for our agile software development management, but also to replace trello boards, basic CRM functionality, and much more.
A hidden gem includes the ability to easily upload an image (iOS app) and annotate it with a drag and drop marker + comment to really increase productivity.
If you're team is looking for or currently uses Trello for your software sprints, give pivotal a try. It is super information dense when needed yet almost a pleasure to look at from a high level status check POV.
maybe I'm biased though...
Kalisi