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/