Iconduck is a collection of 506 (and counting) open source icon and illustration sets.
They can be searched through and downloaded, and are available for personal and commercial purposes (depending on the license, some may request a backlink).
Free
Launch Team
AWS Startup AdvisorPersonalized AWS guidance that meets you where you’re already building
Promoted
GitNoter
Stencil
4Share
Healthy Relationship With Cats
Sealit