Volume 6. This book presents latest research developments in the area of functional programming. The contributions in this volume cover a wide range of topics from theory, formal aspects of functional programming, transformational and generic programming to type checking and designing new classes of data types. Not all papers in this book belong to the category of research papers. Also, the categories of project description (at the start of a project) and project evaluation (at the end of a project) papers are represented. Particular trends in this volume are:. - software engineering techniques such as metrics and refactoring for high-level programming languages;. - generation techniques for data type elements as well as for lambda expressions;. - analysis techniques for resource consumption with the use of high-level programming languages for embedded systems;. - widening and strengthening of the theoretical foundations. The TFP community (www.tifp.org) is dedicated to promoting new research directions related to the field of functional programming and to investigate the relationships of functional programming with other branches of computer science. It is designed to be a platform for novel and upcoming research.