Justus is a tool set for Progress 4GL (ABL) Developers. It includes a simplified parser for 4GL, an API to load Profiler data and a Test Coverage Tool.
Prolint is a tool for automated source code review of Progress 4GL code. Prolint can enforce company coding standards and finds sloppy code and code that may perform differently than how the programmer intended.
aepro is a dependency maintenance tool for progres4gl. It is intended to be used in conjuction with aegis (aegis.sourceforge.net), a source code configuration tool. It (re)compiles progres4GL programs whose sourcecode has changed.