Khan Academy - Chemistry: This site provides an extensive interactive video library, a community for questions and answers, a large bank of practice questions, and many more resources to help you to succeed in chemistry.
ChemCollective Tutorials: ChemCollective tutorials walk students through solving chemistry problems movies, text, and interactive tutors. Because the hints given by these tutors ultimately provide the solution to the problem, they are similar to worked examples in a textbook. Currently, we have tutorials covering concepts in stoichiometry, buffers, and equilibrium.
Chemistry Tutorial (PhysicsClassroom): Tutorial pages on various topics in Chemistry.