A free COBOL compiler
Accounting system for smaller companies written in GnuCobol.
Cobol Cross reference tool for GnuCobol written in Cobol
LIXA, LIbre XA, is a free and open source XA transaction manager
SQL precompiler for COBOL
OpenCOBOL Interactive Compiler
All in, COBOL
COBOL compiler for the PC x86-32 platform.
zCOBOL portable mainframe COBOL compiler, part of the z390 project