March 01
Not sure whether this is obsolete or not, but...
I have been looking through the projects for the GSoC this year and I've found this one for the Ruby Science Foundation

https://github.com/SciRuby/sciruby/wiki/Google-Summer-of-Code-2019-Ideas#ruby-d-binding

Great news for D ;)

P.S. Google helped to find this article as well:

http://tomash.wrug.eu/blog/2009/03/03/rudy-ruby-native-extensions-in-d-programming-language/