Eclipse
From DataFlex Wiki
Eclipse is an Open Source Integrated Development Environment (IDE) which was originally designed for Java development.
Plugins
A robust plug-in architechure has allowed contributors to create plug-ins that support many different development environments, including Visual DataFlex.
Visual Dataflex Tools for Eclipse
Visual Dataflex Tools for Eclipse is a commercial plug-in designed for Dataflex Developers. It includes features such as a Class hierarchy browser, Assisted typing (content assist/intellitype), Folding sections (hides code blocks) and One click fixing of problems (QuickFix).
SubClipse
A plugin for using Subversion from within Eclipse.