UX Database - The biggest free curated product design resources & tools
Design Resources - A curated list of tools in one place to help designers
Freebiesbug - Collection of the best free web design resources.
WebCurate.co - 1600+ Useful Tools. All Hand-Picked. All in One Place.
Dev Resources - Collaborative list of resources for developers
UI HUT - 12,000+ exclusive design resources for Figma, Sketch & XD