Extensions

Darren's Rexx Add-ons
RxSock and RxDial, including C source code. By Darren Abbott.
http://www.darrenabbott.com/rexx/

LesTec Pty Ltd
Modular And Integrated Design (MAID) for Windows and OS/2 (visual Rexx GUI) and input/output function library.
http://www.lestec.com.au/

Rexx/CURL
Interface to the cURL package for access to URL-addressable resources such as web pages, ftp sites, and telnet sessions.
http://rexxcurl.sourceforge.net/

Rexx/Curses
Interface to Curses, a Text-mode user interface.
http://rexxcurses.sourceforge.net/

Rexx/gd
Interface to manipulate simple graphics images.
http://rexxgd.sourceforge.net/

Rexx/ISAM
Interface to ISAM files.
http://rexxisam.sourceforge.net/

Rexx/SQL
Interfaces to many SQL Databases.
http://rexxsql.sourceforge.net/

Rexx/Tk
A library for using the Tk GUI toolkit.
http://rexxtk.sourceforge.net/

Rexx/Trans
Rexx API translation library
http://rexxtrans.sourceforge.net/

Rexx/Wrapper
Build executable program from Rexx programs.
http://rexxwrapper.sourceforge.net/

rxJava
Rexx functions for Java.
http://rpm.pbone.net/index.php3/stat/4/idpl/56083/