Un Dotum by Koaunghi Un is a free sans serif with a plainspoken, early-digital feel. The letters are clean and upright, mixing broad round forms with straight, pared-back strokes that keep the texture calm and unfussy.
That makes it a natural fit for interface graphics, software branding, posters, book covers, and simple editorial headings where you want a neutral voice with a slightly old-web memory. As a free font, it works especially well for short title lines and logo sketches, because the rounded shapes and stripped-down construction keep words looking steady rather than styled up.