COBOL User Groups: COBUG - A COBOL programming portal with references from mainframe COBOL to PC where you will find resources on jobs, compilers, program code, COBOL tutorials, user groups, and other COBOL programming language resources.

http://www.cobug.com/

OpenCOBOL - OpenCOBOL is an open-source COBOL compiler, which translates COBOL programs to C code and compiles it using GCC.

http://sourceforge.net/projects/open-cobol/

COBOL Center - COBOL Programs, Software, Tutorials, Examples, References, Learning and Jobs - The COBOL Center.

http://www.infogoal.com/cbd/cbdhome.htm

COBOL12 - COBOL12 is a 16-bit COBOL compiler that runs under DOS or Windows. The compiler was originally based on Ansi74, but has undergone many changes since its inception. It does not include some features such as SORT and STRING, but it has many non-standard features included.

http://homepages.paradise.net.nz/jsoeberg/

COBOL For GCC - Cobol For GCC - a GNU project - Free Software Foundation.

http://cobolforgcc.sourceforge.net/

COBOL Source Codes  - COBOL projects and source codes.

http://www.vyomworld.com/source/LanguageHome.asp?LangId=4