For those that are interested in self-assembly, or crystal structures, I made a general purpose crystal growth simulator. It can produce samples of the global crystal structure generated by any number of local particle interactions, and comes bundled with a simple editor for designing and testing crystal structures.

Would love to get feedback on the simulator, or on the abstractions I picked for it. While it can simulate scenarios similar to those represented by the aTAM or kTAM tile models, it is significantly more general, and to my knowledge, the first in its niche.