Star 8 Octad is a simple modular origami model made from eight units: only four folds used on each unit and two for assembly.
Diagrams are here: Star 8 Octad
Changing the angles used, the number of units and the proportion of the paper creates different versions of this model. This Geogebra construction shows some possibilities: https://www.geogebra.org/m/mv6gxxbu
Another variation using eight units: Starburst 8 Octad