Here's a every interesting colour tool http://wellstyled.com/tools/colorscheme2/index-en.html
and another one http://meyerweb.com/eric/tools/color-blend/
and another one
http://colorschemer.com/online.html
and this one too http://ficml.awardspace.com/jemimap/style/color/wheel.html
I'm putting these up now so they can be found later in the forum search box when required.