DevOps and Open Source best practices
for your mainframe
Eclipse-based Software Development Environment (SDE)

modernize your application development and operations

improve your productivity

IBM z/OS, IBM i, UNIX and AIX mainframes

basic features: Editor, Navigator, Parser, Emulator

refactoring features: Traffic Player, Web Generator & Designer,
RPG Converter, Lock Optimist

Discover Cobos Features

Cobos for developpersCobos IDE

See the full Cobos 5.5.3 Release Note

new Admin Guide to configure easily your installation

new tool iNavigator to browse and use IBMi libraries

updated Compilation commands to easily compile with the iNavigator

exprience the COBOL developpement with updated tools

upgraded RPG Converter to convert more programs

improved 5250 terminal for Japanese

other tools such as Lock Optimist and Traffic Player still available

New Cobos 5.5.3!

Great features for easy app development:

Cobos  is the smart Software Development Environment (SDE) for mainframe developers.

Modern Editors

Mainframe Ready


Eclipse-based COBOL IDE

The COBOL file editor of Cobos brings the best of Eclipse to COBOL programers: a quick and simple browsing into files with the Outline, Syntax coloring, Autocompletion, Open declaration, Compilation error notifications, Code templates, Changes tracking, Versioning... . All these features have been tailor-made for the COBOL development. Cobos adds to these very convenient features some outstanding features such as a "Word like" revision mode, unfolding COBOL sources with COPY REPLACING expansion, customizable tabulations, mainframe-like CAPS ON.

Ready for the Mainframe

Cobos comes with features & components enabling a deep and powerful integration with your mainframe environments, such as z/Navigator, je3270 (terminal emulator, a remote FTP access, extended CVS support...).

Fit with all environments

Big Blue is not your compilation target? Cobos is also packaged for Windows and UNIX operating systems, with additional features such as remote compilation and local program build capabilities, FTP access to UNIX resources...

And many other features…

Cobos provides mainframe developers with many cool features, in order to make mainframe application development more agile and to fit with specific environements: various SCM tool support, FTP remote access, local program build, 3270/5250 terminal emulator, COBOL, JCL, REXX, PL1, RPG editors …

Cobos 5.5 is now available !

The latest version of Cobos, the professional mainframe Smart Development Environment for Eclipse, has been released. Thanks to Cobos, work locally (edit, compile, etc.) on your workstation (Windows and Linux) or connected to your remote environments mainframe IBM i, IBM z/os, AIX, Unix and Windows.

On the blog

How to install Cobos in Eclipse

Cobos is the most advanced open source COBOL IDE dedicated to Mainframe application development. Based on Eclipse, it combines the best of both worlds by leveraging Mainframe best practices and [...]

Cobos 5.5.2 Release Notes

Here is what is new with Cobos 5.5 Brand new tool : iNavigator. Upgraded compilations and to fully enable COBOL and RPG developpement