glknots(6x) on Linux
The text 7a6ba950361e, as Debian 8 (Jessie) shipped it.
generates some twisting 3d knot patterns
Flags it lists
-
-delay -
-duration -
-fps -
-no-wander -
-no-wireframe -
-root -
-segments -
-speed -
-thickness -
-visual -
-wander -
-window -
-wireframe