The EU INTERREG-IV Programme (2007-2013) is an important source of external competitive funding for a range of knowledge-based marine projects promoting regional and cross-border co-operation and development. During the period 2007-2010, 29 INTERREG-IV projects (including two preparatory actions) with Irish participation were approved for funding. The total value of these projects is circa €75.5m with over €12.3m in grant-aid going to the Irish partners. This directory provides a summary of each of these 29 projects. Many of these projects in turn contribute to the implementation of research, development and innovation priorities identified in Ireland's national Strategy for Science, Technology and Innovation (SSTI: 2006-2013) and its marine component, the Sea Change Strategy (2007-2013).