Material Palette - Generate and export your Material Design color palette
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Color Hunt - Curated collection of beautiful colors, updated daily
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!
Diigo - Diigo is a powerful research tool and a knowledge-sharing community