clipboard.js - clipboard.js provides an approach to copy text to the clipboard with No Flash and No frameworks.
Color Hunt - Curated collection of beautiful colors, updated daily
CALCONIC_ - Build & add interactive calculators to your website! Choose from more than 50 premade calculators or build your own from scratch. No coding required. Free plan available. Zapier Integration. Publish Anywhere.
Material Palette - Generate and export your Material Design color palette
Fancybox - fancyapps.com - Fancy App Store
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!