A workshop on dynamical systems was held at the Lorenz Center in Leiden, Netherlands, December 7-11, 2009, in honour of Prof. Henk Broer's 60th birthday. The workshop covered many aspects of dynamical systems, but emphasized research areas of quasi-periodic motion, KAM theory, Hamiltonian systems, as well as bifurcation theory, applied analysis and numerical analysis, area in which Henk Broer has important contributions.