Been kinda building a trello-like app myself. But it's far more simplistic in features, and i'm trying to build it so it's way more mobile friendly. I have the front end as open source, and the web back end as closed. Not sure why I am doing it this way, but I hope to put out a proprietary iOS app for it at some point.
More or less started it to learn ReactJS. http://gitub.com/agmcleod/desert