Hercules  
   An open source System/370, ESA/390, and z/Architecture emulator for Linux, MacOS, and Windows.
   http://www.conmicro.cx/hercules/

Hercules/390: the New Users Documentation Effort  
   A volunteer effort by many authors to create a Documentation for the Hercules emulator, coordinated by Cory Hamasaki, divided into Primary, Non-Install and Advanced topics.
   http://www.kiyoinc.com/hercdoc.html

MVS 3.8J Technical Resources  
   Documentation for the Hercules and MVS 3.8 environment on a PC.
   http://hansen-family.com/mvs/

Your Private Mainframe  
   Introduction and links about the Intel-based Hercules mainframe emulator, as well as an MVT tutorial and MVS 3.8 binaries and add-ons.
   http://www.schaefernet.de/hercules/

Hercules page  
   Installation, software, and programming guide.
   http://www.jaymoseley.com/

Yahoo! Groups : hercules-390  
   Discussion group for users of the Hercules ESA/390 mainframe emulator
   http://groups.yahoo.com/group/hercules-390/

Running Classic Operating Systems with Hercules  
   A presentation at SHARE 97 by Jay Maynard of Global MAINTECH Corp. Looks in detail at OS/360, VM/370 and MVS Version 3.8. [PDF]
   http://shareweb.share.org/proceedings/sh97/data/S2881.PDF