Interface D with other languages

[Andrea Fontana]

I know there are several tools around to import libraries from 
other languages. For example dstep or swig.

Is there any tool that we can use to export D to other language? 
Something like SWIG but d-based rather than c/c++ based. Anyone?

It would be great (for example) to @annotate 
classes/struct/method/function to export and have a 
php/python/.net library (or anything else) to use.

I guess a double step is needed: D -> C interface -> XXX classes.