I believe that typography is a key component to the success of flat design. You can’t just use any font in a flat design, the fonts have to be specific, kind of like these 40 really irresistible free fonts for flat design.
All the fonts you find here are bold, simple, and straight-forward which is suitable for the modern and minimalistic flat design concept. Of course, they can be used not only for flat design, but for any web project you like.
28. Bariol by atipo