Molecular structures represent just one kind of data that is commonly explored with visualization tools. To convey a message to your peers effectively, sometimes you need more than just a table or chart. How you present even text elements is critical.
Here are some links to resources and tools for visualizing data.
GAPMINDER Interactive visual statistics with global examples
WorldMapper A collection of world maps, where territories are re-sized on according to the subject of interest.
CMAP The IHMC CmapTools program empowers users to construct, navigate, share and criticize knowledge models represented as concept maps. It allows users to, among many other features, construct their Cmaps in their personal computer. See: Pollen Concept Map
Infosthetics A collection of projects that represent data or information in original or intriguing ways
Data Visualization: Modern Approaches A collection of innovative approaches to data.
Edward Tufte An expert in the presentation of informational graphics. See his books.
Please add other visualization links as well through comments to this post.