Interfacer is a website that offers over 300 high-quality free design resources. These resources include fonts, illustrations, mockups, icons, web templates, and UI kits. The collection is created by talented individuals from around the world and can be used for both personal and commercial projects. Examples of the resources available on Interfacer include clay iPhone and iPad mockups, various font families such as Kohnes Makina and Nexa Bold Cyrillic, and illustrations ranging from cute characters to landscapes. Additionally, the website offers a variety of icon sets, including ones for business, medical, and finance purposes. With its extensive range of design resources, Interfacer is a valuable tool for designers, developers, and anyone seeking high-quality assets for their projects.