RawTherapee - RawTherapee is a free RAW converter and digital photo processing software.
Color Palette Generator - Enter the URL of an image and find its color palette
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.
Color Hunt - Curated collection of beautiful colors, updated daily
Wolfram Mathematica - Mathematica has characterized the cutting edge in specialized processing—and gave the chief calculation environment to a large number of pioneers, instructors, understudies, and others around the globe.
Coolors.co - The super fast color schemes generator! Create, save and share perfect palettes in seconds!