Golden Gate is the software that I wish I were smart enough and/or had enough time to make myself. It is an emulation layer for the Apple IIgs that runs on modern operating systems. With it you can run command-line Apple IIgs programs (like Orca/C) on a Windows computer, for example.

Orca/C itself is experiencing a resurgence, in that the original developer released its source code. Now there is an active group of developers updating it, adding new features and fixing old bugs.

From the Golden Gate website:

One unanticipated use is installing ORCA/C updates, since they also follow the standard ORCA layout.

opus-extractor --verbose --source=/ ORCAC.220B3.2mg