Grafica library
This example was motivated by two blog entries posted by Lisa Charlotte Rost on her blog. It shows the tight relationship between a country's average personal income and the average life expectancy. The point areas are proportional to the country's population. Left click on a point to see the country name. Drag the plot area with the mouse to pan in any direction. Zoom in and out with the mouse central button.
For more details, check the source code or play with it at JSFiddle.