z/PDT and zD&T will run current z/OS under emulation on Linux. The ADCD for use with those products includes almost all the IBM software you'd come across in a mainframe environment:

http://dtsc.dfw.ibm.com/adcd/adcd.shtml

https://www.youtube.com/watch?v=tI5jk-1OI-g

https://ibm.github.io/zdt-learners-edition-about/