The Joy of Stats video: Hans Rosling shows lots of great ways to present data.
Don’t miss the segment “200 Countries, 200 Years, 4 Minutes”, also available separately.
ticalc.org has five programs to make pie charts. Though I haven't evaluated them in depth, PIEGRAPH.ZIP looks most interesting based on the screen shots.
stemleaf.zip (1 KB) is a TI-83/84 program that makes stemplots.
Application of false positives: Probability and the war on terror, by Sam Savage and Howard Wainer. A downloadable False Positives Calculator is included.
(advanced) A fascinating application of probability is
Benford’s Law at Mathworld.
What is a normal distribution? by Steve Simon gives an overview with diagrams. Near the bottom of the page there’s a downloadable spreadsheet that draws normal distributions.
The Behavior of the Sample Mean
by Gerald Dallal — pictures show how sample means are distributed and why that distribution is different from the shape of the population.
Can you estimate or test difference of
proportions of voters who favor A or B when there are also
undecided voters? See
Mike's 2-Sample Proportion Problem.
Excel and your calculator generate pseudo-random numbers,
but Random.org
has lots of true random number generators, including numbers, coin
flips, and dice rolls.