ProtoSans15 by Roman Gornitsky is a free geometric techno display font built from squared forms and firm, even strokes. The letters favor right angles, boxy curves, and broad spacing, giving the design the direct look of an early digital interface.
Its modular shapes echo circuit diagrams and block-built icons, a close match for game graphics, technology branding, and science-fiction posters. The same mechanical simplicity also suits electronic music artwork and product packaging with a retro-computing theme.