Decision Explorer might be useful for qualitative researchers and possibly even for game/decision theorists. The developer, Banxia, describes it as a "tool for managing "soft" issues - the qualitative information that surrounds complex or uncertain situations. It allows you to capture in detail thoughts and ideas, to explore them, and gain new understanding and insight. The result is a fresh perspective, and time saved through increased productivity, release of creativity and a better focus".
Tags: CAQDAS, qualitative research