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GnuCOBOL (formerly OpenCOBOL) is a free, modern COBOL compiler. GnuCOBOL implements a substantial part of the COBOL 85, X/Open COBOL and newer ISO COBOL standards (2002, 2014, 2023), as well as many extensions included in other COBOL compilers (IBM COBOL, MicroFocus COBOL, ACUCOBOL-GT and others).
GnuCOBOL translates COBOL into C and internally compiles the translated code using a native C compiler.
Build COBOL programs on various platforms, including GNU/Linux, Unix, Mac OS X...
MEDDAC is the seeding point for designing a new approach to Operating System design itself. It is an Open Source project with roots in mainframe design and development the author began in 1979. Monitor Editor Disassembler Decompiler Assembler Compiler
The Universal COBOL Compiler (UCC) is a Java-based COBOL to Java bytecode cross-compiler. It's made up of a COBOL compiler, a Java-based COBOL runtime, and a package for manipulating Java class files.
zCOBOL portable mainframe COBOL compiler, part of the z390 project
The zCOBOL portable mainframe COBOL compiler with support for compiling multiple dialects of COBOL into any one of several target language executable programs including HLASM compatible mainframe assembler, Java, C++, or Intel assembler. All downloads and other information are kept at the z390 project site; see the home page link for more information.