glknots(6x) on Linux
The text f06e2d9d5a4d, as Debian 4.0 (Etch) shipped it.
generates some twisting 3d knot patterns
Flags it lists
-
-delay -
-duration -
-fps -
-no-fps -
-no-wander -
-no-wireframe -
-root -
-segments -
-speed -
-thickness -
-visual -
-wander -
-window -
-wireframe