Below are suggested websites that cover chemical structure, safety & toxicology data, physical & chemical properties, bio-activity and molecular visualization & modeling.
The Sigma-Aldrich Web Toolbox features helpful online science research tools and resources for Analytical Chemistry, Life Science, Chemical Synthesis and Materials Science. Tool examples include a structure search and an interactive periodic table.
ChemTube3D contains interactive 3D animations and structures, with supporting information for some of the most important topics covered during an undergraduate chemistry degree.
SureChem specializes in organic chemistry recognition from patents. Search by drawing/pasting chemical structures or keywords. It also connects to the RSC's ChemSpider.
Sponsored by the National Science Foundation, Science360 is an up-to-date view of breaking science from around the world. This contains videos on every branch of science, including chemistry.