Nine Planets, a Multimedia Tour of the Solar System
http://www.nineplanets.org/nineplanets.html

Welcome to the Planets
http://pds.jpl.nasa.gov/planets/welcome.htm

Exploring the Planets
http://www.nasm.si.edu/ceps/etp

Space Wander
http://www.spacewander.com

The Animated Virtual Planetarium
http://jove.geol.niu.edu/faculty/stoddard/planetarium.html

Miscellaneous
http://seds.lpl.arizona.edu/billa/tnp/nineplanets.html
http://www.the-solar-system.net/
http://www.eps.mcgill.ca/wtp/planets/welcome.htm
http://nssdc.gsfc.nasa.gov/planetary/planetfact.html
Exploring the Planets
Planets