Aktiv Grotesk is a sans-serif font. It goes well with Roboto Mono, Graphik, Faktum, Roboto, Abril Fatface, Lust, New Spirit, Lora, Fira Mono and Abril Display. If you're thinking about using Aktiv Grotesk then try Give 11px a shot for content.
People commonly tag it as design, portfolio, sans serif, modern, agency, list, music, photo, writing and sans. You can get it from Fonts.com, MyFonts and Typekit.