font
Montserrat is a sans-serif font. It goes well with Open Sans, Roboto, Source Sans Pro, Lora, PT Serif, Georgia, Esteban, Lato, Gill Sans and Tinos. If you're thinking about using Montserrat then try 30px for headers. Give 16px a shot for content.
People commonly tag it as portfolio, design, agency, tech, service, app, social, fashion, food and modern. You can get it from Font Squirrel, Google Web Fonts and Typekit.
Montserrat on its own
66 Montserrat samples