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GSF Software (by Gilbert Saint-Flour)

Information, People, Software

Software and freeware written by Gilbert Saint-Flour for the MVS, OS/390, z/OS, TSO, ISPF environments.

Welcome to GSF Software          
Tools and services for:

  • z/VSE to z/OS Migration and Conversion
  • Language Conversions
  • z/OS Productivity
  • z/OS JCL Redesign
  • Data Center Consolidations

Mark Zelden's MVS Utilities

Information, People

Mark's MVS Utilities - REXX & TSO CLISTs, ISPF Edit Macros, Sample JOBs, Documentation and more!

Michel Castelein's Home Page

Consulting, People

For more than 30 years I enjoyed being an z/OS (formerly known as MVS and OS/390) system engineer, i.e. I'm a freak that loves genuine computers (= mainframes).
(So, don't ask me anything about Mickeysoft's Windoze etc.)

There are two kinds of people: those who do, and those who say what & how to do.
Well, in 1987 I switched sides as I am now an education consultant/instructor.
Since beginning 2005, I'm freelance. Arcis Services is my own company.

I've written and taught a lot of mostly z/OS-related courses, but "Java Programming" is an example of platform-independent course I've developed.

I have already conducted a huge number of public (i.e. open enrollment) and in-house course sessions mainly in Belgium, but also in Luxembourg, the Netherlands, France, the United Kingdom, Germany, Sweden, Switzerland, the Czech Republic, and Israel.
The handouts are written in English but I teach my courses in Dutch, French, and English.
It is worthwhile to mention that I also trained people "from scratch". They had no prior IT knowledge but became operational after a 2-month "mainframe academy" education.

OS/390 and z/OS Freeware (by Lionel B. Dyck)

Information, People, Software

Welcome to my website which I've dedicated to making available to the 'world' software that I've written over the years. Here you will find XMITIP, the OS/390 and z/OS E-Mail application (on the TCP/IP Tools page) and many other tools for OS/390 and z/OS. These tools are primarily written in REXX with a few Assembler programs.
My name is Lionel B. Dyck and I've been in systems programming since 1972 (starting with MVT 21.6 - remember IBM APARs delivered on punch cards) and have developed a number of tools over the years. I've created this site to (1) share useful code that I've developed and (2) to return a little back to the community of mainframe systems programmers from whom I've learned so much. I've gleaned code and knowledge from the MVT Tools Tapes (remember the Blue Berets?) to the current CBT Tape and a wealth of Web Sites. I hope my contributions here are helpful to others.

AFew z/OS Tools and Toys (by Doug Nadel)

Information, People

z/OS Freeware, samples and documentation
Except where noted, the programs and tools downloadable from this site written by and are available from Doug Nadel


Information, People

MVS freeware here, along with some of my thoughts about MVS, the web, and software generally.

Bill's Big Iron page

Information, People

This page is dedicated to S/390 Mainframes and the MVS world.

Have fun with Norbert's Mainframetools

Information, People

On this site, you will find my ownwritten Rexx-Execs, Rexx-Functions, ISPF-Procedures and Edit-Macros.

HiLMAs macro language home page by Piero Ronchi

Information, People

These pages are a presentation of my work as a System programmer in mainframe environment: a macro language to do well structured, high level, portable programs in MVS, TSO, CMS, VSE and CICS environment. It resemble an high level language, but it is only Assembler/370.

Mad Monks MVS Performance Bazaar

Information, People

MVS and MXG performance tidbits

Planet MVS (David Alcock)

Information, People

Planet MVS - or: how I learned to stop worrying and love the mainframe!

This is a non-profit web site that is dedicated to helping fellow MVS (OS/390) systems programmers. It is a "fan" site of the MVS operating system and IBM mainframes in general.

Prycroft Six

Information, People

Prycroft Six provides MVS, OS/390 and z/OS program products and technical services including system software development.

Rock Painters (Bruce Gillispie)

Information, People

Mainframe, Midrange, & Micro Computers, plus Technical Articles 

S/390 System Utilities Main index (Jan Jaeger)

Information, People
  • ZZSA, Standalone utilities for MVS, including editor, VTOC list, device list, DASD ZAP etc.
  • NODSI, An utility to manipulate datasets that have GRS ENQs against them.
  • F1REWALL, An implementation of the VTAM session management exit ISTEXCAA to control session setup by means of RACF profiles.
  • MPF$NTFY, A MPF exit which transforms WTO messages into JES2 notify messages.
  • PARMTZ, An Unix System Services program which will allow you to set the TZ variable from CLOCKxx or the Sysplex Timer.
  • IRXFMATH, A REXX function package which provides mathematical functions.
  • WHOHAS, An ISPF utility to display GRS ENQ resources and requestors.
  • VMCP, Provides a CP operator command to MVS when it is running under VM.
  • JSCH, Like ASCH, a transaction scheduler, but this one schedules started tasks rather then ASCH transactions.
  • PDS upload/download utilities, Utilities to create IEBUPDTE format sequential files from partitioned datasets, and restore ISPF statistics after rebuilding PDS using IEBUPDTE

S390 Resources at Nichols.biz

Information, People

A small but fine collection USS and z/OS goodies including the home of PGP2.6.3is for MVS

Sam Bass' MVS Home Page

Information, People

A small collection of MVS utilities.

The Green Screen

Information, People

Are you a mainframer? You can find out here at this personal website focused on the mainframe. Additional features: table of contents listings for several out of print books, links to current discussion lists and blogs, mainframe videos from The Raised Floor Network and others, and humor pages.

The REXX Macros Toolbox on David McRitchie's Home Page

Information, People

REXX macros for the programmer who is already using or is familiar with any of the following: REXX, MVS, SPF, ISPF, PDF, PDS file, OS/2, SPF/PC, or TSO; running on mainframe or PC's.

Yet Another OS/390 Systems Programmer Site


As a relative newbie to systems programming I would not be considered a Dino. I have a firmer grasp on the internet than on OS/390!

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Dr. Radut Consulting