The 9th edition of eNTERFACE will take place in the FCT - New University of Lisbon (Portugal). This workshops aim at establishing a tradition of collaborative, localized research and development work by gathering, in a single place, a team of senior project leaders in multimodal interfaces, researchers, and (undergraduate) students, to work on a pre-specified list of challenges, for 4 weeks. Participants are organized in teams, attached to specific projects, working on free software. Each week will typically consist of working sessions by the teams on their respective projects plus a tutorial given by an invited senior researcher and a presentation of the results achieved by each project group. The last week will be devoted to writing an article on the results obtained by the teams plus a big session where all the groups will present their achievements. Proceedings are expected to be published by Springer, IFIP AICT series (indexed in Web of Science).