Images search engines
http://finda.photo/
https://pixabay.com/
https://unsplash.com/
https://www.pexels.com/
http://www.stockvault.net/
https://allthefreestock.com/
https://burst.shopify.com/
https://ccsearch.creativecommons.org/
https://jaymantri.com/archive
Illustrations
https://undraw.co/
https://fresh-folk.com/
https://illlustrations.co/
https://www.blackillustrations.com/
https://usesmash.com/
https://isometric.online/
https://www.opendoodles.com/
https://icons8.com/vector-creator
https://generated.photos/ # AI generated faces
Icons
https://thenounproject.com/
https://tablericons.com/
https://super.so/icons
https://www.flaticon.com/
https://ionicons.com/
https://material.io/resources/icons/
https://remixicon.com/
https://icons.getbootstrap.com/
https://systemuicons.com/
http://rostype.com/ # fonts
Parametric icons
https://heroicons.com/
https://teenyicons.com/
https://tablericons.com/
https://holasvg.com/icons/
Audio
https://artlist.io/