Check the listing for details. Watcom VX REXX Visual Development Environment for OS/2 Version 2.0. Listed at 225.00 USD. The Watcom VX REXX Visual Development Environment for OS/2 Version 2.0 is a software tool designed for creating and developing REXX programs on the OS/2 operating system. It provides a user-friendly interface for visual programming, making it easier for users to design and code their programs. With its focus on environmental factors, this tool allows users to create efficient and optimized programs that take advantage of the unique features of the OS/2 operating system.