The large dataset accumulated from LHC, corresponding to over 2fb-1 of data, allows studies of many rare processes. ATLAS has studied all combinations of two bosons; gamma, W and Z. Fiducial cross sections are measured for region of phase space where the detector has high acceptance, and the WZ and ZZ processes are used to provide new constraints on the triple-gauge couplings of the Standard Model lagrangian. The WW, ZZ and gamma-gamma states, and additional fermionic modes, have also been used to perform a search for the Higgs boson covering the mass region from 110 to 600 GeV. Unprecedented sensitivity is achieved over most of this mass range. The analyses use all decay modes of the WW and ZZ states producing at least one electron or muon, as well as Higgs decays involving photon, tau and b pairs. The latest results will be presented and discussed.