Ten Things About Color Palettes and Palette Generators
Freeware Caution: always scan free downloads of anything for bugs and other threats before dumping the programs into your hard drive.
Big Huge Labs' Color Palette Generator will generate a color palette (complete with inventive names and HTML codes) based on any of your photos.
The 30 day free trial of Color Wheel Pro software allows you to create innumerable color palettes of your own.
According to the designer, ColorBlender.com is "ia web-based tool for creating color palettes (here referred to as "blends") for web design and other types of digital design. The main feature of the tool is to have a complete "blend" of 6 matching colors created when choosing only one "base" color. This makes it very quick and easy to create a color scheme for e.g. a website, as you can instantly use the colors for text, backgrounds, links, border etc."
ColorRotate allows you to work with virtual colors in 3D (I didn't want to register so I couldn't past the front/splash page, but I was able to rotate the cone thing and the site is frequently recommended as legit and very helpful.)
CSS Drive's Image to Colors Palette Generator also generates palettes based on any of your photos but gives you a range of palettes from light to dark as well as a complete color palette.
Tiny Eye Labs' Multicolr Search Engine allows you to pull up a selection of Flickr photos that match the color (or combination of colors) you select for the search.
ColRD's Palette Creator page changes according to the colors you pick, and also allows you to export your custom palette designs.
Pictaculous generates multiple palette suggestions based on your uploaded image and works from your phone, too.
Silk allows you to create online with virtual silk (this lovely link was stolen directly from The Word Nerds.)
59times.com's Web Color Generator generates some neat random color palettes.
Finally, I thought this ColorMatters.com article on color branding and trademarking was a fascinating read.