Hey not sure this is the correct place, its a worthy hint for anyone making pages.
Sanrope Color Picker Pro 3
The best color picker around. You can get any color on your screen and it shows the RGB, hex etc for it.
http://www.sanrope.com/sanrope.asp?page=cpp3
Cool Ruler 1.5
Floating ruler that can be used to check table or layer pixel sizes. Interesting app, if nothing else.
http://www.fabsoft.com/products/ruler/ruler.html
Browser Sizer 1.5
Resize your browser to fit screen resolutions with a couple clicks.
http://www.applythis.com/browsersizer/
Pixie 3.1
Basic screen color picker.
http://www.nattyware.com/pixie.html
========= Comparing Files =========
These compare php (or other languages) files to check code changes.
ExamDiff (free)
http://www.prestosoft.com/ps.asp?page=edp_examdiff
Winmerge (free)
http://winmerge.sourceforge.net/
Beyond Compare (30-day trial)
http://www.scootersoftware.com/