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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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HaMLetpermalink

HaMLet is a faithful and complete implementation of the Standard ML programming language (SML'97). It aims to be an accurate reference implementation of the language specification, a platform for experimentation with the language semantics or extensions to it, and a useful tool for educational purposes.

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Isabellepermalink

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Isabelle is a generic proof assistant. It allows mathematical formulas to be expressed in a formal language and provides tools for proving those formulas in a logical calculus.

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MLtonpermalink

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MLton is an open-source, whole-program, optimizing Standard ML compiler.

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SML/NJpermalink

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Standard ML of New Jersey (abbreviated SML/NJ) is a compiler for the Standard ML '97 programming language with associated libraries, tools, and documentation.

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