Is there a native (not cygwin) version of DDD available for download somewhere?
There is also a GDB front-end for MS Visual Studio, called WinGDB. It supports both Cygwin and MinGW. You use it just like built-in debugger in VS. It's also possible to debug remotely on Linux via SSH.
DDD has not been ported to Windows AFAIK. But there ARE native gdb, which can be perfectly built using MingW32. You can also build Insight natively using Mingw32. You can also give a try to BeaverDbg
Try the Affinic Debugger GUI. It is a native Windows application and is similar to DDD. It uses GDB as the backend.
For a cross-platform gdb frontend, Qt Creator comes to mind. It also does "native" cdb on Windows, but I am not sure that's what you are looking for.
Since there is no native windows (not cygwin) gdb, there can't be a native windows (not cygwin) ffffd.