Software

Octrope Fast software for finding the self-contacts of tubes around space curves.
plCurve Library for handling piecewise-linear (polygonal) curves in space.
perlETC A Perl version of Clark Kimberling's Encyclopedia of Triangle Centers.
Ridgerunner Knot-tightening program.
Tsnnls Fast sparse non-negative least-squares solver.
Vecttools Applications, built using plCurve, for more advanced operations on polygonal curves in space, including code to generate triangulated tubes around the curves (tube), compute HOMFLY polynomials for knots (knottype), generate curves from curvature and torsion (libktcurve), and splitting and joining curves together (splitvect and joinvect). Requires the GNU Scientific Library.