NUT

A metaprogramming knowledge-based environment that combines object-oriented (procedural, modular) and declarative (structural synthesis of programs) programming paradigms.

NUT (SunOS distribuition) and …
… PROGRAMMING SYSTEM NUT (Linux distribuition) at the Institute of Cybernetics of the Estonian Academy of Sciences.
The NUT System [MIA, Web Archive copy] at Software Engineering group of the Teleinformatics Department of the Royal Institute of Technology, Sweden.