ESA's INTEGRAL satellite, launched in 2002, provides imaging and spectroscopy of the sky in the hard X-ray and soft gamma-ray band. INTEGRAL observes highly energetic phenomena in the universe, such as accreting black holes in the Milky Way, neutron stars, supermassive black holes at the centre of galaxies, and supernova explosions giving rise to gamma-ray bursts. The analysis of the INTEGRAL data is complex, and the François Arago Centre helps the teams at CEA/SAp Saclay and at the APC to improve the quality of the resulting images and spectra, and with the scientific exploitation through usage of the computing cluster. The centre also provides a fast link for the usage of the computing facilities at CC-IN2P3 in Lyon.