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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.

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Chibi-Schemepermalink

License Reference

Chibi-Scheme is a very small library intended for use as an extension and scripting language in C programs. The default language is R7RS Scheme, with support for all libraries.

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CHICKENpermalink

License Reference

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RSchemepermalink

License Reference

RScheme is an object-oriented, extended version of the Scheme dialect of Lisp that compiles to C, or to bytecode for virtual machine execution.

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Scheme 48permalink

License Reference

Scheme 48 is a bytecode interpreted implementation of R5RS designed to be used as a testbed for experiments in implementation techniques and as an expository tool.

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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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Ypsilon Schemepermalink

License Reference

Ypsilon is the implementation of Scheme Programming Language, which conforms to the latest standard R6RS* established in September 2007. Ypsilon achieves a remarkably short GC pause time and the best performance in parallel execution as it implements "mostly concurrent garbage collection", which is optimized for the multi-core CPU system.

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