Interfacer - Collection of more than 200+ free design resources
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Facebook Design Resources - A collection of free resources made by designers at Facebook
PutCut - PutCut is a social bookmarking tool for saving links.
Freebiesbug - Collection of the best free web design resources.
netroStation - netroStation is a visual bookmark manager to save & organize hundreds of links.