Rexx

ANSI X3J18
Standard for "Programming Language REXX".
http://www.rexxla.org/Standards/standards.html

bsf4rexx
Package for interaction between Rexx and Java using Bean Scripting Framework. Developed by Rony G. Flatscher.
http://wi.wu-wien.ac.at/rgf/rexx/bsf4rexx/

Quercus Systems
Personal REXX for Windows 98/NT/3.1, OS/2 and DOS. REXXLIB extensions, papers, freeware collection and consultants list.
http://www.quercus-sys.com/

REXX
Growing article, with links to many related topics. [Wikipedia]
http://en.wikipedia.org/wiki/REXX

RexxInfo.org
Companion site to book about the language, with an annoated link collection.
http://www.rexxinfo.org/

RexxLA
The Rexx Language Association. With symposion information, ANSI standard and large link collection. Archives available to members only.
http://www.rexxla.org/

RexxTags
Rexx Server Pages compiler for rapid prototyping of XML tags in Rexx. Requires Apache and Mod_Rexx. [Open surce, Common Public License]
http://www.rexxtags.org/

ToUniteAmerica: The REXX Files
Mainframe programs examples, articles and links. By Gabriel F. Gargiulo, author of Rexx books.
http://www.theamericanprogrammer.com/programming/rexxfiles.shtml

ONLamp.com: Rexx: Power Through Simplicity
Article by Howard Fosdick shows off several features of the Rexx programming language. <small>(May 26, 2005)</small>
http://www.onlamp.com/pub/a/onlamp/2005/05/26/rexx.html

Pigdog Journal: Laughable Technology
Yay for REXX! Column in a satirical online magazine. <small>(October 25, 1999)</small>
http://www.pigdog.org/auto/laughable_technology/link/955.html

Writing CGI Scripts in REXX
Article from Web Techniques magazine. <small>(May 1, 1996)</small>
http://www.webtechniques.com/archives/1996/05/rexx/