http://hopac.github.io/Hopac/Hopac.html
Why do you think that https://github.com/samsquire/preemptible-thread is a good alternative to Hopac
http://hopac.github.io/Hopac/Hopac.html
Why do you think that https://github.com/samsquire/preemptible-thread is a good alternative to Hopac