GnuCOBOL (formerly OpenCOBOL) is an open-source COBOL compiler. GnuCOBOL implements a substantial part of the COBOL 85 and COBOL 2002 standards, as well as many extensions of the existent COBOL compilers.
Net Express (for Windows) is highly productive development environments for COBOL which enable developers to produce high performance enterprise applications that run on a wide range of hardware and operating systems.
An IDE for the next generation of development for ILE applications on IBM i. ILEditor will support development with any ILE language, be it CL, RPG, COBOL, C and C++. Error listing and syntax highlighting is available for all ILE languages.
Eclipse
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United States