While not quite #MARCHintosh, I am trying to find some useful software for the #BeOS side of the SiniStarMax. So far, I've found the BeOS for PowerPC Preservation Project archive, but nothing more. Hopefully soon, we can see a renaissance of software on BeOS for PPC as we're seeing for all the classic Macs during MARCHintosh and beyond.

https://github.com/beosppc/beos-ppc-archive

GitHub - beosppc/beos-ppc-archive: The BeOS PowerPC preservation project archive

The BeOS PowerPC preservation project archive. Contribute to beosppc/beos-ppc-archive development by creating an account on GitHub.

GitHub
Nice. Besides VNCServer, I also compile a PPC version of BeShare whenever I make a release. Downloadable at https://web.ncf.ca/au829/BeOS/
Index of /au829/BeOS