Open Source COBOL

Don't hate COBOL until you've tried it:  https://opensource.com/article/17/8/what-about-cobol

GnuCOBOL: https://en.wikipedia.org/wiki/GnuCOBOL

3 open source projects for modern COBOL development - https://opensource.com/life/15/10/open-source-cobol-development

1. "GnuCOBOL (formerly known as OpenCOBOL) is a modern, open source, COBOL compiler. It works by translating COBOL code into C and compiling the code using GCC." -  http://sourceforge.net/projects/open-cobol/
   "Installing under most other Linux distributions and other UNIX-style systems is just as simple. For Debian-based distributions, just replace "dnf" with "apt-get". Mac users can use homebrew to install GnuCOBOL. Installing on Windows is a little more complicated, but instructions are available for those interested in trying GnuCOBOL on Windows." - http://opencobol.add1tocobol.com/oc_gettingstarted_windows.html
2. "You can write COBOL using the text editor of your choice, but integrated development environments make life easier. OpenCobolIDE is a specialized IDE designed for working with COBOL. It provides code completion, code folding, syntax highlighting, and a navigation tree, all of which aid in working with COBOL code." - https://github.com/OpenCobolIDE/OpenCobolIDE
3. "Maybe you would like to combine some COBOL code with a more modern development technology? If that is the case, you are in luck. COBOL bridge for Node.js allows you to use COBOL code in Node.js projects." - https://github.com/IonicaBizau/node-cobol

"opensource COBOL" is open-source COBOL compiler, an extension of the Japan-specific features.  "opensource COBOL" translates COBOL program to C code and compiles it using GCC or CL. - https://github.com/opensourcecobol/opensource-cobol

Free COBOL Compilers and Interpreters:  https://www.thefreecountry.com/compilers/cobol.shtml