Fuzzy sets for Ada is free and distributed in source code.
The version 3.3 provides implementations of:
1. Confidence factors with the operations not, and, or, xor, +, *;
2. Classical fuzzy sets with the set-theoretic operations and the
operations of the possibility theory;
3. Intuitionistic fuzzy sets with the operations on them;
4. Fuzzy logic based on the intuitionistic fuzzy sets and the
5. Fuzzy numbers both integer and floating-point ones with
conventional arithmetical operations;
6. Linguistic variables and sets of linguistic variables with
operations on them;
7. String-oriented I/O is supported.