JFS

A development environment for JFL, combining features from traditional programming languages with fuzzy logic and machine learning. Freeware for Windows 95/98/NT and Linux.
http://inet.uni2.dk/~jemor/jfs.htm

FuzzyCLIPS

An extension of the CLIPS (C Language Integrated Production System) expert system shell. Demonstration programs, user documentation, software downloads and licensing opportunities.
http://ai.iit.nrc.ca/IR_public/fuzzy/fuzzyClips/fuzzyCLIPSIndex.html

NRC FuzzyJava Toolkit & FuzzyJess

A set of Java classes that handling and reasoning with fuzzy concepts.
http://ai.iit.nrc.ca/IR_public/fuzzy/fuzzyJavaToolkit.html

Dataengine

DataEngine is the software tool for intelligent data analysis which unites statistical methods with neural networks and fuzzy technologies.
http://www.dataengine.de

Intelligent Information Corporation

(IIC) provides advanced data analysis and system modelling software using fuzzy logic technology. The IIC fuzzy engine achieves greater accuracy and predicatability by a factor of 10% or greater over current data modelling applications.
http://www.iicfuzzy.com

Jerry Mendels Type-2 Software

A collection of M-files for Matlab. Free to download.
http://sipi.usc.edu/~mendel/software/