ChemCollective - Virtual labs covering Stoichiometry, Thermochemistry, Equilibrium, Acid-Base Chemistry, Solubility, Oxidation/Reduction and Electrochemistry, and Analytical Chemistry/Lab Techniques
ChemReaX - Virtual chemical reaction labs covering Acid-Base Titration, Chemical Kinetics, and Le Chatelier's Principle
Chemdraw - Takes you to ChemOffice Professional and ChemDraw Prime which can be downloaded for use. Be sure to read through the activation guide for each item you wish to use so you understand what you will need to do to activate and fully access the product.
ChemCollective - Automatically graded activities and lab problems
Grandinetti - Collection of tutorials on many different General Chemistry topics
PhET (University of Colorado Boulder) - Interactive chemistry simulations
MERLOT - Collection of open access chemistry simulations
American Association of Chemistry Teachers (AACT) - Interactive chemistry simulations
goREACT - Interactive Periodic Table, from the Museum of Science and Industry in Chicago, which allows users to mix and match elements to see how they react, including atomic and ionic numbers, Lewis Dot diagrams, and information about each element