Building the ubiquitous applications environment MobiLife, Ambient Networks, and SPiCE This work has been performed in the framework of the IST project IST-2004-511607 MobiLife, which is partly funded by the European Union. The author would like to acknowledge the contributions of the colleagues from Nokia Corporation, Elisa Corporation, Motorola SAS, Motorola Ltd, DoCoMo Communications Laboratory Europe GmbH, Fraunhofer Gesellschaft zur Frderung der angewandten Forschung, Siemens Mobile Communications, Ericsson AB, OY LM Ericsson AB, Hewlett Packard Italia, University of Surrey, Alcatel CIT, NEC Europe Ltd, University of Helsinki, University of Kassel, Stichting Telematica Instituut, NEOS Engineering SRL, UNIS, Suunto Oy, BellStream SP, Helsinki University of Technology and Telecom Italia.