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Pure is a modern-style functional programming language based on term rewriting. It offers equational definitions with pattern matching, full symbolic rewriting capabilities, dynamic typing, eager and lazy evaluation, lexical closures, built-in list and matrix support and an easy-to-use C interface. ... [More] The interpreter uses LLVM as a backend to JIT-compile Pure programs to fast native code. Pure also integrates nicely with a number of other computing environments, most notably Faust, PureData, Octave, Reduce and TeXmacs. A fairly extensive collection of addon modules is available, which makes Pure usable as a compiled scripting language for a variety of purposes. [Less]

Nuthatch/J – A software transformation library based on tree walking

GrGen.NET: transformation of structures made easy. The Graph Rewrite Generator offers declarative languages for graph modeling, pattern matching, and rewriting, as well as rule control; brought to life by a compiler emitting highly efficient assemblies and a rapid prototyping environment offering graphical and step-wise debugging.