The official source for all Yoon Gothic fonts. They offer various subscription models (like "FontCloud") that give you access to the entire library.
The YD Gothic series (including 100, 200, 500, and 700 series) is celebrated for its compact structure modern aesthetic
If the commercial price is a barrier, several free-to-use fonts offer a similar "Gothic" or geometric sans-serif look: Century Gothic Web Font Alternatives - Intavant