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Copyfree Works

The license status of some works may be more complex than it at first appears here. In some cases, the license status listed for a given work is the "primary" license under which it is distributed. In several cases, parts of the work may be distributed under other licenses -- potentially even non-copyfree licenses.

Where present, descriptions are typically drawn from the claims of the projects themselves, and represent neither claims nor opinions of the Copyfree Initiative. Inclusion here (with or without description) does not constitute, and should not be inferred as, endorsement of any project.

Listings are presented for informational purposes only, and no representation is made as to the accuracy or utility of any information provided. Use at your own risk.

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mkshpermalink

License Reference

The MirBSD Korn Shell (mksh) is an actively developed free implementation of the Korn Shell programming language and a successor to the Public Domain Korn Shell (pdksh).

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okshpermalink

License Reference

Portable OpenBSD ksh, or oksh, is based on pdksh.

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pdkshpermalink

License Reference

PD-ksh is a clone of the AT&T Korn shell. At the moment, it has most of the ksh88 features, not much of the ksh93 features, and a number of its own features.

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PowerShellpermalink

License Reference

PowerShell Core is a cross-platform (Windows, Linux, and macOS) automation and configuration tool/framework that works well with your existing tools and is optimized for dealing with structured data (e.g. JSON, CSV, XML, etc.), REST APIs, and object models. It includes a command-line shell, an associated scripting language and a framework for processing cmdlets.

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scshpermalink

License Reference

Scsh is an open-source Unix shell embedded within Scheme, running on all major Unix platforms. It is a variant of Scheme 48 designed for writing real-life standalone Unix programs and shell scripts.

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Zshpermalink

License Reference

Zsh is a shell designed for interactive use, although it is also a powerful scripting language. Many of the useful features of bash, ksh, and tcsh were incorporated into zsh; many original features were added.

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