SymmHub is a platform for creating symmetry-based applications, and a small collection of such apps. It is authored by Vladimir Bulatov and Chaim Goodman-Strauss, with assistance from Scott Vorthmann.
Minimal Sample
SymPix - Symmetry from pictures
SymSim - symmetry from simulation of Gray-Scott PDE
SymSim - symmetry from simulations of Ginzburg-Landau PDE
SymChaos - symmetry from Chaotic Iterated Attractors