Ask HN: Has anybody built Tinder/Imgur style mailboxes, GTD, email?

I was sitting at a coffeeshop with my mobile device earlier and I was just testing and going through all of my apps. I realize I enjoy the experience of using Imgur the most of all of my apps, I think because of the information-to-screen ratio. It allows me to focus on one thing at a time.

I want to spend more time going through my Trello cards or emails, but I find myself annoyed at how they're all sorta... batched together. I would prefer to be able to play around with them like index cards. Does something like this already exist?