Hello!
I know that there was many efforts of creating BerkeleyDB for D interface.
But db4d already is too old (doesn't compile with fresh D compiler) and there is no more actual BDB-port on public.
So I want to present my bdb2d project: https://sourceforge.net/p/unde/bdb2d
It is a part of another big project: http://unde.sf.net

Please love and favor.
Thanks.