This document describes a project aimed at developing and evaluating software to support online social deliberation skills. The project has received funding from the National Science Foundation. It involves researchers from the fields of computer science, psychology, law and conflict resolution. The project seeks to enhance online dialogue and deliberation tools to provide support like perspective taking, self-reflection, consideration of different viewpoints, and management of uncertainty. It explores facilitating skills related to argumentation, critical thinking and inquiry. The project also examines issues around power differences and applying deliberation methods across cultural contexts. It aims to provide passive interface supports, facilitator dashboards, and adaptive intelligent supports within mediated online discussions.