Interpreters

BeBRexx
BeOS port of BREXX.
http://www.bebits.com/search?search=rexx

BREXX
Free interpreter for Unix, MSDOS, WinCE and Amiga. By Vassilis N. Vlachoudis.
http://ftp.gwdg.de/pub/languages/rexx/brexx/html/rx.html

CICS Rexx
Language and development environment.
http://www-306.ibm.com/software/htp/cics/products/rexx/

KEXX
Dialect used in KEDIT (XEDIT-like editor). Summary by Rex Swain.
http://www.rexswain.com/kedit.html

r4
Classic Rexx language interpreter for Windows, from Kilowatt Software.
http://www.kilowattsoftware.com/r4Page.htm

Rexx Anywhere
Writing portable Rexx execs. By Dave Alcock.
http://www.planetmvs.com/rexxanywhere/

REXX/imc
Open source Rexx interpreter for Linux/Unix.
http://users.comlab.ox.ac.uk/ian.collier/Rexx/rexximc.html

REXX/VSE
Product page, including support information and samples.
http://www-03.ibm.com/servers/eserver/zseries/zvse/support/rexx.html

S/REXX
UNIX implementation from Benaroya. Graphical debugger available.
http://www.sedit.com/rexxgrph.html

uni-REXX
An ANSI standard implementation for UNIX systems. Free sample code library.
http://www.wrkgrp.com/unirexx/