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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.

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CHICKENpermalink

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CMU Common Lisppermalink

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CMUCL is a high-performance, free Common Lisp implementation that runs on most major Unix platforms.

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Gauchepermalink

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Gauche is an R7RS Scheme implementation developed to be a handy script interpreter, which allows programmers and system administrators to write small to large scripts for their daily chores. Quick startup, built-in system interface, and native multilingual support are some of its goals.

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Lambrapermalink

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Lambra is an experiment to implement a functional, distributed Lisp on the Rubinius Virtual Machine, much à la Erlang.

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Montezumapermalink

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Montezuma is a text search engine library for Lisp based on the Ferret library for Ruby, which is itself based on the Lucene library for Java.

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Quicklisppermalink

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Quicklisp is a library manager for Common Lisp. It works with your existing Common Lisp implementation to download, install, and load any of over 1,200 libraries with a few simple commands.

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Racket [1]permalink

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Racket is a programming language with similarities to the Scheme (Lisp) family and a past close relationship to it, which specializes in education (ex. SICP, etc), metaprogramming / language design, and creation of higher-level domain-specific languages.

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RSchemepermalink

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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

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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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Steel Bank Common Lisppermalink

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Steel Bank Common Lisp (SBCL) is a high performance compiler and runtime system for ANSI Common Lisp. It provides an interactive environment including a debugger, a statistical profiler, a code coverage tool, and many other extensions.

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TinySchemepermalink

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TinyScheme is a lightweight Scheme interpreter that implements as large a subset of R5RS as was possible without getting very large and complicated. It is meant to be used as an embedded scripting interpreter for other programs. A lot of functionality in TinyScheme is included conditionally, to allow developers freedom in balancing features and footprint.

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Ypsilon Schemepermalink

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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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