Try this Online Drawing application by MugTug. If free and really cool for people who want to do things online.

ColoRotate has an intuitive interface that eliminates the need to memorize or jot down color combinations or numbers.

COPASO is an advanced color palette tool that helps you create the perfect color schemes and themes.

This list/table was created to demonstrate the vast difference between non-gamma corrected and gamma corrected colors, on a display that requires a gamma correction of 2.5.

This is an experimental website about colors. Colorcell wants to find the most popular color combinations.

You can create amazing color schemes.GenoPal always proposes colors that are eye-pleasing. GenoPal colors are based on how your eye explores color – they are naturally harmonious.

A Web Color Combinations Testing Tool that allows you to view color combinations online

Color Hunter is a place to find color palettes based on images.

An every day color resource, with daily fresh color scheme.

COLOURlovers™ is a resource that monitors and influences color trends.

One of the best gradient makers I have seen online, The quality of gradients is very good. This gradient images can greatly enhance the look of your site

Choose your website/blog colors from here. Has dynamic color wheel.

Free online tool for color palette design and matching

A tool for web developers to test website color combinations, along with a library of pre-selected combinations.

A color swatch generator based on the tutorial located here: http://www.stuffandnonsense.co.uk/archives/creating_colour_palettes.html

It's a simple web application that lets you create transparent PNG images in any color, using just a few mouse clicks—no need for Photoshop, Painshop Pro or any other imaging app.

Color Schemer Studio is a professional color matching application for anyone from hobbyists to advanced professionals.Build dazzling color schemes with software from Color Schemer.

A tool for web developers to test website color combinations, along with a library of pre-selected combinations.

Free online tool for color palette design and matching

A color swatch generator based on the tutorial located here: http://www.stuffandnonsense.co.uk/archives/creating_colour_palettes.html