simple heat map - (Sep/30/2010 )

I am trying to generate a simple heat map showing fold chnages in two samples no clustreing (attached samples from published paper)what should be the best tool and link if any for the steps involved. I do have issue of adjusting color contrast.
tahnks

You could use R to do this.

pcolor function in Matlab!

http://www2.warwick.ac.uk/fac/sci/moac/students/peter_cock/r/heatmap/