On Tuesday, 8 July 2014 at 21:22:31 UTC, Walter Bright wrote:
7. "D-Routines" - goroutines for DGoroutines are the killer feature of Go for a number of sensible people. We pretty much have this already with fibers, but what is lacking is a scheduler, which will take some effort, and a "Channel" type, which should be easy.
vibe.d has something similar, which could go into the standard library IMHO:
https://github.com/rejectedsoftware/vibe.d/blob/master/source/vibe/core/concurrency.d