ChemBrain is a worldwide chemical database for three-dimensional molecular structures with integrated artificial intelligence that is capable of learning any molecular property. You also can use it as a laboratory notebook. It's extremely simple to input three-dimensional molecules, and is supported by a fast geometry-optimizer. It stores any kind of data for use in artificial neural networks calculations, it learns from stored data for property prediction of as yet unknown molecules, and it features an automatic classification of molecules. The program allows for the mapping of molecules in relation to their structural similarity, allows for an unambiguous fragment search, and enables similarity searches based on various molecular properties. The text-input option enables its use as electronic lab journal and there are special discounts for educational use.