This paper is a presentation of a special issue of Philosophical Explorations, whose origin is a meeting held in Valencia in 2008. The issue includes contributions by David Widerker, Derk Pereboom, Timothy O'Connor, Thomas Pink, Dana Nelkin, Helen Steward, Maria Alvarez, Christopher Hookway, and Pascal Engel. The paper contains a map of the main positions in the debate about free action, free will, and moral responsibility, as well as a reference to some central issues in this traditional and yet lively debate. The discussion about responsibility and related notions, such as agency and freedom, has recently been extended from decisions and actions to beliefs, to give rise to new research perspectives, both in epistemology and in the metaphysics of freedom and responsibility for actions. The papers included in this special issue are valuable contributions to the research about freedom and responsibility in both action and belief.