The Scheme Natural Language Toolkit (S-NLTK) is a Scheme R6RS library for language and text processing, and various tasks related to symbolic and statistical analysis of language data.
An optimising compiler for the R5RS Scheme language, written in R5RS Scheme, compiling to ANSI C, supporting Unix-like platforms, performing whole-program analysis and online partial evaluation.
libtour is a generic tournament processing library. The rules, participants, schedule, and results of a sporting tournament can be defined in the Scheme programming language and given to the library as input.
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FramerD is a distributed semi-structured object database originally developed at MIT. It provides an internationalized Scheme-based scripting language, built-in text analysis tools, and special support for web scripting.
A pattern matching library with a syntax similar to regular expressions, but more suited for morphological analysis. Differences from regex include: named variables, iterating over all possible matches, and extensible syntax.
Stalin is an aggressive optimizing batch whole-program Scheme compiler. It uses advanced flow analysis and type inference and a variety of other optimization techniques to produce code (using C as an intermediate language) that is extremely fast.