Last time I checked @taigaio looked really good.
More alternatives are pouring into
https://news.ycombinator.com/item?id=13356318 right now.
https://twitter.com/ToH_82/status/818467925648609280
1 reply
Replying to @coderbyheart
Also, GitHub projects is basic but very functional if you are using Trello
mostly for your software projects: https://www.youtube.com/watch?v=C6MGKHkNtxU