The present manuscript provides a panoramic overview of the most recent work carried out at a European level on the research and development of fuel processor (FP) units for various type of fuel cells (FCs), with an update on actual existing commercial products manufactured in Europe, namely auxiliary power units (APUs) and combined heat and power systems (CHPs). An increasing number of integrated complete FP units has been developed for a large variety of fuels: natural gas, biogas, low sulfur road diesel, propane, butane, liquefied petroleum gas (LPG), methanol, and ethanol. Some FP, APU and CHP systems are at present available on the European market. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.