The following databases are maintained at IAA-ULB: Nuclear Database (BRUSLIB - A collection of nuclear data (masses, fission barriers, E1 strength functions, nuclear level densities, partition functions, reaction rates) of interest for nuclear astrophysics, stellar evolution and nucleosynthesis), Nuclear Network Generator NetGen (A tool for generating nuclear-reaction rates on user-defined networks), NACRE II (An update of the Nuclear Astrophysics Compilation of Reaction Rates (NACRE) including the evaluation of 34 reactions on stable targets with mass numbers A<16), The Ninth Catalogue of Orbits of Spectroscopic Binaries (SB9), The Henize sample of S stars, The radial-velocity monitoring of barium and S stars, Molecular linelist (Molecular linelists for stellar spectra), and Stellar models (Pre-main-sequence and super-AGB phases).