PhunSoft.ch had been founded in 1996 to publish a few programs for the PSION® Organiser II, and the PSION® Series 3 handheld computers. They are still available from this site (see PSION). Besides PSION stuff, the site today is a place to publish articles and software related to other platforms.
IBM Z systems mainframe computers and the z/OS® mainframe operating system have been my playfield for almost 36 years until my retirement in 2019. I still love that environment, although I don't have access to a real-life system anyore. The IBM Master the Mainframe environment is a basic play field, to which I do have access to verify (most of) the code what I publish here.