Florida State University
Florida State University: Virtual Microscopy
These interactive tutorials allow you to adjust the magnification and focus of the object. Requires Java.
Florida State University
Florida State University: Translational Microscopy
With this interactive tutorial, you can view cholesterol, pesticide, ibuprofen, and other samples under a microscope. You can adjust the focus, intensity, and zoom in on the object. Requires Java.
Florida State University
Florida State University: Magnification Module
Explore the effect of increasing the magnification on a microscope when viewing various samples such as onion root mitosis.
Other
Nikon: Nikon Small World: Photomicrography Competition
Nikon has, for years, sponsored a competition to showcase the work of photographers who take pictures of microscopic subjects. View galleries of winning images for past competitions as you learn about the art and science of microscopy.
Other
Science Stock Photography
This site has numerous pictures of microscopic images. It also has a search engine so you can find specific objects. Images were captured with light microscopes, as well as electron microscopes.
Lawrence Berkeley National Laboratory
Berkeley Lab: Ncem: Electron Micrographs
This site contains a gallery of scanning electron micrographs of non living substance.
Other
Bowling Green State University: Algal Image Archive
A host of marine and freshwater algal images. View many different types of algal through Bowling Green State University's Center for Algal Microscopy and image Digitization.