iconmonstr - free, monstrously big and continuously growing source of simple icons run by one creator.
HDRI Haven
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All HDRIs are licenced as CC0 and can be downloaded instantly, giving you complete freedom.
No paywalls, email forms or account systems.
mockups-design
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Mockups-design.com is a simple site. A site where designers from all over the world can find premium mockups for their projects. It is important to me, that all these mockups should be completely free and easy to download.
gradienthunt
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Gradient Hunt is an open collection of beautiful gradients founded on June 2018 by Html Colors founder Franco Maldonado. Gradient Hunt was made with the motivation of internet becoming a nicer and better place. Gradient Hunt is now a popular resource used daily by thousands of people all over the world.