Interfacer - Collection of more than 200+ free design resources
Josh Parnham - Software Developer and organiser
Facebook Design Resources - A collection of free resources made by designers at Facebook
Buffer - Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
Freebiesbug - Collection of the best free web design resources.
Relephant - All of your screenshots, intelligently organized