Jax GNU and GNU Linux on S/390 z/VM and z/OS Page

All about ports, actual or potential, of Gnu Free Software to the IBM VM environment.
Now extended to cover various GNU-osity on the 390 architecture.

• Read Disclaimers.
• Visit Jax VM and IBM S/390 page.

GCC on S/390

• David Pitts' OS/390 GCC Compiler Page
• GCCESA is a GCC cut for VM/ESA
  
• GCCMVS is a GCC cut for MVS and CMS
  
• Tachyon z/Assembler for GCC helps you assemble and link GCC compiles on z/OS (OS/390).
  

Linux on S/390 (zSeries)

• IBM's official Linux on zSeries (S/390) site
  
• Linux on the ESA/390 Mainframe Architecture A good place to start  your exploration.
• LinuxVM.org New site dedicated to Linux running on top of IBM VM/ESA.
• Mainframe Linux Wiki
  
• Marist's Linux for S/390 site
  
• Millenux's Iron Penguin Independent Linux/390 distribution and RPM site.
• OpenPower Project is the (Marketing-misnamed) project where IBM lets you compile and test your Linux apps on IBM's own S/390 Linux servers.
  
• Slack/390 Slackware Linux for VM. GCC on S/390

Other Interesting Stuff

• PDM4 This isn't strictly Gnu software, but it's free software. Both compiles under C/370 and runs on VM OpenEdition.