Martin Ankerl wrote:

> Hi, I have modified the existing console testrunner of the Ruby's unit
> tests that it provides a colorful output. I have only tested it in
> Linux, but it should work in any Unix environment, probably in windows
> + cygwin too.
> 
> http://martinus.geekisp.com/rublog.cgi/Projects/rgb-console.html

Now if somebody can also add syntax highlighting to irb I'll be in 
console heaven. :)

Regards,
Florian Gross