MvsHelp
- Rexx/CLIST discussion forum.
- http://mvshelp.net/vbforums/forumdisplay.php?f=146

CMS/TSO Pipelines
- Data flow programming with REXX integration.
- http://vm.marist.edu/~pipeline/

Tek-Tips: REXX Technical Help Forum
- REXX technical support forum and mutual help system for computer professionals.
- http://www.tek-tips.com/threadminder.cfm?pid=277

FAD-H Software
- TSO/REXX functions - DSLIST replacement, global variables and dynamic allocation. Also some TSO utilities.
- http://www.btinternet.com/~ashleys/fadh_software.htm

ISPF-L
- Mailing list archives, search, and subscription services.
- http://listserv.nd.edu/archives/ispf-l.html

SSC, Inc.
- Assembler Rexx functions for dynamic concat, PDS functions, sleep, WTO(R).
- http://www.sscmainframe.com/freeware.htm

Planet MVS
- OS/390 freeware and mainframe-related topics by Dave Alcock.
- http://www.planetmvs.com/

TSO-REXX
- TSO Rexx discussion list, archives and subscription.
- http://vm.marist.edu/htbin/wlvindex?TSO-REXX