Google offers free business listings called google places.

Google says..

"Millions of people search Google Maps every day. A free listing on Google Maps makes it easy for them to find you.

Use Google Places to create your free listing.When potential customers search Maps for local information, they'll find your business: your address, hours of operation, even photos of your storefront or products.It's easy, free, and you don't need a website of your own."

A google account is required to sign up. With your google account you can edit your listing.

Get your business on top of Google with Google Places.