I don't know if the devs care about this, but the dbDOS commercial fork of DOSBox was released in version 6.0 a few months ago, but the source code still hasn't been posted here:

http://www.dbase.com/support/updates/#dbDOS

There are sometimes some interesting things in the source, and it might be worth having them available from the latest version. Some of the claims made for dbDOS seem a bit questionable, but the programmer who works on it seems to have some good ideas (like a system menu for Win32 and enhancements to the meagabuild printing system).