KNOT is a tool for knot theory to draw diagrams of knots and links (in S^3) and knotted surfaces (in S^4) and calculate many invariants.
License: GNU GPL.
Tags: topology, knot theory.
Maintainer: K. Kodama.
Sponsors: Kobe University.
Homepage: http://www.math.kobe-u.ac.jp/~kodama/knot.html.