A heat map is a graphical representation of data where the individual values contained in a matrix are represented as colors. Fractal maps and tree maps both often use a similar system of color-coding to represent the values taken by a variable in a hierarchy.
HEAT-VIEW (Heating-Map of all Clicks)
SCROLL-VIEW (Let us see how far your visitors scroll down!)
Full and detailed description.
Many examples, how to use Clickr
Commented and Organized Code