CALICE (Calorimeter for Linear Collider Experiment) is an R&D collaboration of more than 350 physicists and engineers from around the world. The goal of the collaboration is to develop imaging calorimeters for experiments at a future lepton collider, for the upgrades of the forward calorimeters of the LHC experiments or for any other future experiments which includes calorimeters. To date several large prototype calorimeters have been designed, built and tested in test beams.