iconduck – 111,548 Free Open Source Icons and Illustrations              
https://iconduck.com/

Iconduck is a project to make open source icons and illustrations more accessible. We’ve started doing this by collecting and tagging them, and making them searchable. This will be added to World Wide Web Reference Subject Tracer™. This will be added to Entrepreneurial Resources Subject Tracer™. This will be added to the tools section of Research Resources Subject Tracer™. This will be added to Business Intelligence Resources Subject Tracer™.