z390

z390 is a powerful, open-source mainframe macro assembler and emulator. It enables users to assemble, link, and execute programs using either a graphical user interface or command line interface. z390 is distributed under the GNU open source license.

z390 is a portable mainframe macro assembler and emulator project web site.
Main features:
- Use z390 graphical user interface or command line interface
- Use simple commands to assemble, link, and execute programs
- z390 is distributed under GNU open source license