Home of the Open Object Rexx Project. ooRexx is the open source version of IBM's Object REXX Interpreter. It is upwardly compatible with classic REXX and will execute classic REXX programs unchanged. The project is managed by the Rexx Language Assoc.
Rexx/CURL is a Rexx extension to enable Rexx programmers to control the cURL interface.
Mod_Rexx is an Apache loadable module which interfaces to Rexx. All phases of an Apache request can be processed with Mod_Rexx. It supports Open Object Rexx and Regina Rexx.
The open sourced NetRexx reference implementation
NetRexx is a dialect of the REXX programming language to run on the Java virtual machine. It supports a classic REXX syntax, with no reserved keywords, along with considerable additions to support object-oriented programming in a manner compatible with Java's object model, yet can be used as both a compiled and an interpreted language, with an option of using only data types native to the JVM or the NetRexx runtime package. Originally from IBM, NetRexx is the creation of Mike Cowlishaw, the 'Father of Rexx'. This IBM product has been open sourced in 2011.
The Object REXX GTK+ Project provides a modal dialog manager interface to the GTK+ library from IBM's Object REXX. The project consists of a set of REXX external functions and an Object REXX class library which wraps those functions.
Rexx/Vix is a Rexx interface for the VMWare API (Vix). This interface allows a Rexx programmer to control VMWare Server and Virtual Machines running on VMWare Server.