List of free palettes stuff for developerππ½
If you're looking for all programming tools around palettes (not just free). Check this page List of palettes Programming Tools

ColorsWall
ColorsWall - place to store your color palettes. Brand color codes. Generate Random colors palette. Design colors combinations. Tool to choose colors for Your website.
Tag: colors, palettes, design

Branition Colors
Hand-curated collection of color palettes best fitted for branding.
Tag: color-picker, colors, palettes
pppalette
Easy color palette generator for beautiful color schemes. Analogous, complementary, split complementary, triadic, monochromatic (tones, tints, shades) & more.
Tag: colors, palettes, design, color-picker