4X4 Curves by Benjamin O'Sullivan of FontStruct is a free geometric dingbat font assembled from circles, quarter-circles, and tightly fitted square forms. Its compact symbols are solid, rounded, and modular.
It can turn a logo or poster into an abstract tiled emblem, with recurring curves suggesting motion, rotation, and interlocking parts. The same simple geometry suits album artwork and digital graphics built around optical patterns, modernist abstraction, visual puzzles, or maze-like imagery.