Most of us have heard of Google's well-known and much-loved tools — Gmail, Google Earth, Google Maps, and many more. Those products and services are used by millions of people around the world every day.

What many people don't know, however, is that Google actually has a bunch of other features and tools that are incredibly useful.

For example, did you know Google has a massive free font library, an interactive map of the galaxy, and a service that finds your fine-art doppelgänger?

Here are 17 under-the-radar services Google offers.

Jillian D'Onfro contributed to an earlier version of this story.