Lorenz Curve

http://www.caida.org/research/policy/geopolitical/bgp2country/pics/population.png
The Lorenz Curve is a graph that shows distribution of wealth. This graph shows distribution of GDP and IP addresses across the world population.

Correlation Matrix

http://seekingalpha.com/article/97777-don-t-pull-out-of-the-markets-diversify-into-uncorrelated-assetsA correlation matrix shows a correlation between many variables. This graph shows the relationship between stock products.

Index Value Plot

http://ddo.typepad.com/An index value plot is a visualization map that is plotted on a line graph. This graph shows a company's financial index year by year.

Scatterplot

http://psyc.queensu.ca/~frostlab/sun98.htmlHere is a scatterplot that uses velocity and stopping distance as variables. This scatterplot shows the initiation of braking points.

Star Plot

http://www.answers.com/topic/spider-plot 
This star plot shows the numbers of farms of different types in different regions of England. There are many cattle and sheep farms in the South-West, whereas cereal farms predominate in the East.

Climograph

http://www2.volstate.edu/kbell/climographs.htmA climograph plots monthly average temperature and precipitation for some location. This graph shows temperatures and precipitation for Manaus, Brazil.

Windrose

http://en.wikipedia.org/wiki/Wind_roseThis plot shows how wind speed and direction are typically distributed at a particular location. This windrose plot is of the LaGuardia airport in New York, NY.

Triangular Plot

http://www.lithoprobe.ca/media/slideset/slides/tools20.asp
This is a triangular plot displaying differences between three variables. This image is used to plot the chemical analysis of igneous rocks.

Parallel Coordinate Graph

http://peltiertech.com/WordPress/composite-baseball-player-evaluation/Here we have a parallel coordinate graph showing many variables. This map is of baseball players statistics and percentages of overall played games.

Histogram

http://election.princeton.edu/todays-electoral-vote-histogram/Here is a histogram of the electoral vote between McCain and Obama. Probability distribution of all possible outcomes calculated from current state polls. The central dark blue bars represent the 95% confidence interval. The tails are plotted in green.

Box Plot

http://www.obermatt.com/knowledge/indexing/percentiles/Here is a box plot of a company named Obermatt. This box plot shows their company sales growth.

Stem and Leaf Plot

http://www.eduplace.com/math/mhm/5/06a/index.htmlThis Stem and Leaf plot show quantitative data in a graphing form. This graph shows ages of people at a family reunions.

Nominal Area Choropleth Map

http://www.opentopography.org/index.php/blog/detail/lidar_for_the_northeast_project_fundedThis is a nominal area choropleth map that shows a proposal for an extensive Lidar collection of coastal regions of the Northeaster U.S. It displays nominal data.

Unstandardized Choropleth Map

http://www.injusticeeverywhere.com/?p=3333This unstandardized choropleth map displays the amount of police misconduct incidents across the United States. It displays the incidents as the number reported for each area.

Standardized Choropleth Map

http://www.statcan.gc.ca/pub/92f0138m/2008003/figures/5200001-eng.htmThis is a standardized choropleth map of people 14 years of age and under in Canada. This map shows distribution among different areas.

Univariate Choropleth Map

http://www.clearlyandsimply.com/clearly_and_simply/2009/06/multicolored-choropleth-maps-with-excel.htmlHere we have a map with only one variable. The colors represent pop, soda, coke or other. The map displays what each state calls a soda beverage.

Bivariate Choropleth Maps

http://rkpjrhist615.wordpress.com/category/geography-310/This Bivariate Choropleth map displays two variable on this one map. First variable is total persons with disabilities ages 21 to 64 and the second variable is the unemployment rate per county.

Unclassed Choropleth Maps

http://math.yorku.ca/SCS/Gallery/milestone/thumb5/popup/bssn1_popup1-19.htmThis is an unclassed choropleth map with shadings from black to white. This map shows the distribution and intensity of illiteracy in France.

Classed Choropleth Maps

http://jeffline.jefferson.edu/aisrnews/?p=356Here is a classed choropleth map of people 65 and over in Philadelphia. This map uses shading and color intensity to identify classes.

Range Graded Proportional Circle Map

https://www.e-education.psu.edu/natureofgeoinfo/book/export/html/1553Here we have a range graded proportional circle map of the Hispanic population as a percentage of the total population.This circle map depicts the circles in relation to ranges of data.