Roboto is a famous neo-grotesque sans-serif typeface which was developed by Google as a system font its famous operating system Android. Google says this font as modern, yet approachable and emotional.
Roboto Font Download
The entire Roboto font family has been licensed under the Apache license and officially available for download since January 12, 2012.
Roboto font family includes six weights Thin, Light, Regular, Medium, Bold and Black with matching italics. It also includes condensed styles for Light, Regular, and Bold.