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EMolecules — open-access chemistry search engine. Draw a structure, search named chemicals, or browse by category
General Chemistry Online — common compound database, chemical construction kits, guides to 1st semester general chemistry, calculators, self-guided, interactive tutorials and more to help prepare new chemistry students
KnowledgeDoor — online and tablet-friendly conversion calculators; periodic tables; tools for atomic structures, thermodynamics, nomenclature and more. An all-in-one chemistry reference and units & constants handbook for chemistry students and experts alike
Learn Chemistry — by the Royal Society of Chemistry. Learn chemistry terms and concepts through presentations, tutorials, quizzes, games and more
MatWeb — material property data. Searchable database of material data sheets. Contains data sheets for thousands of metals, plastics, ceramics, and composites