Besides being provided to various vendors through BSD, DBX has also found its way into other products:
DBX is also available on IBMz/OS systems, in the UNIX System Services component. DBX for z/OS can debug programs written in C and C++, and can also perform machine level debugging. As of z/OS V1R5, DBX is able to debug programs using the DWARF debug format. z/OS V1R6 added support for debugging 64-bit programs.