I would like to share an open source chess game application developed using meteor + react + redux + material-UI + react-router following Mantra spec.
This app is for play any chess games between friends anytime anywhere on any devices.
It is designed with mobile first. Its UI will adjust automatically for any devices.
Currently it includes go game and chess game, more games can be added.
It includes a manual lib which can be extended to more.
Note[Jun 21th, 2016]: Just switched from flow router to react router so that it will be less depends on meteor and more at react community side. And we can use redux to store all local states instead of separate them on two places (redux and flowrouter).