Tikel
Particle systems are a technique used in computer graphics to model so called "fuzzy" objects,
e.g. fire, water, smoke, ... by means of a collection of particles who all get computed
and rendered.
As an illustration for one of my exams I wrote this little demo.
Nomenclature
Since it was a test system for particles, I first wanted to call it Testicle (or Testikel following the same reasoning in Dutch). That name didn't sound right for a reason, so I shortened it to Tikel.