LASTAABY.COM

• SDL Hercules 4.x Hyperion - The Hercules System/370, ESA/390, and z/Architecture Emulator
  
  
  
• Source code repository on Github for the SDL Hercules 4.x Hyperion version of the System/370, ESA/390, and z/Architecture Emulator
  
  
  
• MVS38j Goodies - Jim Morrison's downloads (includes 3380 support for MVS 3.8!)
  
  
  
• Jay Moseley's Hercules site - lots of Hercules and MVS information
  
  
  
• MVS 3.8 System Documentation - Tommy Sprinkle's MVS 3.8 documentation
  
  
  
• IBM Public Domain Software Collection - Jay Maynard's S/360 and S/370 public domain software archive
  
  
  
• Tim's Hercules Page - Tim Pinkawa's Hercules Page
  
  
  
• Harold Grovesteen's Stand-Alone Tool Kit (SATK) - a Toolkit for creating baremetal programs targeting mainframe compatible systems