Hi, I've made an attempt at porting Richard Lord's Ash component/entity system to D. It was mainly an exercise in learning about component/entity systems. It tries to remain faithful to the API of ash, but there were some aspects of ActionScript that did not map cleanly. It passes all the unit tests - but I've not yet ported the demonstration game (asteroids) to it yet (this will be done when I have time to grok openGL or SDL). Documentation is sparse. Not tested under windows - only linux. If this is of any use to anyone, I'd like to know ! (improvements/suggestions welcome). It has a dub file, and will produce a library using it but not the unit tests. The native build tool is bub - a build tool that will build/test complex projects across multiple languages (currently D/C++/C) (it is a work in progress - e.g. documentation output is lacking) https:// github.com/ axiom-a/ashd