Gregor Kemper Universitaet Heidelberg "A Database of Invariant Rings" (with Elmar Körding, Gunter Malle, B. Heinrich Matzat, Denis Vogel, Gabor Wiese), Preprint 2000-33, IWR, Heidelberg, 2000. Abstract: We announce the creation of a database of invariant rings. This database contains a large number of invariant rings of finite groups, mostly in the modular case. It gives information on generators and structural properties of the invariant rings. The main purpose is to provide a tool for researchers in invariant theory.