A 3270 font in a modern format
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Feb 13, 2026 - Python
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Mainframe
A mainframe is a powerful computer system designed for processing large data volumes, supporting multiple users & applications. Known for reliability, security, and scalability, they’re vital in industries like finance & insurance. Typical languages include COBOL, PL/I, and Assembly, with Java and Python gaining popularity.
Here are 374 public repositories matching this topic...
The SDL Hercules 4.x Hyperion version of the System/370, ESA/390, and z/Architecture Emulator
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Jul 11, 2026 - C
A comprehensive COBOL mainframe credit card management application designed to showcase AWS mainframe modernization technologies and migration patterns.
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Oct 16, 2025 - COBOL
A curated list of software emulators and simulators of PCs, home computers, mainframes, consoles, robots and much more...
emulator awesome simulator robotics simulation emulation amiga commodore commodore-64 awesome-list simulations hacktoberfest mainframe vic20 mini-computer mainframes commodore64 mini-computers hacktoberfest2024
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Oct 30, 2024
The API Mediation Layer provides a single point of access for mainframe service REST APIs.
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Jul 24, 2026 - Java
Language Model for Mainframe Modernization
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Aug 23, 2024 - Python
DX3270 is a free TN3270 and TN5250 for MAC on ARM with all modern features you expect tailored for modern Macs. http://dn3270.com/
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Jul 14, 2026 - C++
mainframe application portfolio analysis, antlr4 grammars and java for static analysis of cobol+cics+db2+sqlims+execdli, jcl
analysis static-analysis cobol cics db2 jcl ims mainframe antlr4-grammar sbom application-portfolio application-portfolio-analysis
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Jun 29, 2026 - ANTLR
Lightweight Java library for reading and writing fixed-width / fixed-length flat files using annotations on POJOs — for banking, payroll, EDI, mainframe, and batch integrations.
java parser formatter spring-boot annotations flat-file banking payroll batch-processing edi mainframe fixed-width fixed-length fixed-format
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Jul 18, 2026 - Java
Serverless Legacy Modernization : AWS Lambda + Cobol
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Apr 6, 2023 - Shell
Test library for Robot Framework to allow interaction with IBM Mainframe 3270.
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Feb 23, 2026 - Python