A free COBOL compiler
EDITEL is a screen editor/code generator for GnuCOBOL programmers
Editor for Fixed Width, Csv and Existing Xml files.
Cobol Cross reference tool for GnuCobol written in Cobol
A COBOL debugger for GnuCOBOL/OpenCOBOL written in GnuCOBOL
COBOL XML file parser
All in, COBOL