Font Awesome Icons are incredibly awesome. Avada has them built right into the theme so you can use any of the 300+ icons. Each one comes in 3 sizes and can be used with or without a circle and every one is 100% full vector so they look incredibly sharp and are retina-ready!
Sidewalk Labs
Sidewalk Labs is an educational entertainment project developed by Aaron Stout.
It has no affiliation with the Google urban development project, which can be found here.