The ChemVis project is one of 23 research projects in the strategic research initiative "V3D2" ("Distributed Processing and Exchange of Digital Documents") of the German Research Foundation (Deutsche Forschungsgemeinschaft DFG) and provides visitors with a new perspective on chemistry through the use of embedded dynamic and interactive high-end graphics. The new VRML animation generator alone is worth a visit to the site. Simply upload your chemical structure in xyz format converted using a drawing package with that export facility and enter an e-mail address for delivery of the URL for your VRML version.
If you have sunglasses, you might also want to take a look at John Kyrk's site at http://www.johnkyrk.com/index.html which has some neat chemical graphics as well as explanations of what works and why when you print different image types, not so useful for those only on the web but essential information when sending illustrations to print publishers.
Chembalancer does exactly what it says on the tin - helps you balance chemical equations. It is a simple online to help teachers demonstrate and students learn what is involved in balancing reactions. Give it a try; it's fun, if somewhat gaudily colored.
Niven's Virtual World of Chromatography A mixed German-English site that provides a usual dictionary between the two languages for chromatography and related terms, although it is still under construction at this time. The site also provides a useful route into external information resources and references of interest.