What resources/websites do you know about infographic and icon design?

Question

User interface

What resources, sites, and so on do you know where you can get collections of infographics and various icons?
Like fontawesome.io/cheatsheet
Let's collect with answers and comments a large database of sites, resources, links to github and so on, where you can get icons from ....
1) free and freely distributed, used
2) paid, limited, but you can which to use
Thank you collectors :)

Answer 1

https://www.google.com/design/spec/style/icons.html + Material Icons
and good icon sites:
https://thenounproject.com <-- best
iconmonstr.com <-- icons are good, but terribly small and looks like the project is dead
www.flaticon.com <-- baby freepik

Answer 2

https://icomoon.io/fontello.com
fontastic.me
_

Answer 3

https://www.syncfusion.com/downloads/metrostudio - I use it myself, it's simple but convenient (you can choose the right size and color, make icons from symbols)