  Excited hadrons are seen as resonances in the scattering of lighter stable
hadrons like $\pi$, $K$ and $\eta$. Many decay into multiple final states
necessitating coupled-channel analyses. Recently it has become possible to
obtain coupled-channel scattering amplitudes from lattice QCD. Using large
diverse bases of operators it is possible to obtain reliable finite volume
spectra at energies where multiple channels are open. Utilising the finite
volume formalism proposed by L\"uscher and extended by several others,
scattering amplitudes can be extracted from the finite volume spectra. Recent
applications will be discussed where the energy dependence of scattering
amplitudes is mapped out in several quantum numbers. These are then continued
to complex energies to extract resonance poles and couplings.
