This review concentrates on three widely used marriage preparation inventories and a group of smaller, well-researched couple questionnaires used by an extensively researched marriage preparation program. The three inventories included are Facilitating Open Couples Communication Understanding and Study, Premarital Preparation and Relationship Enhancement, and Relationship Evaluation Questionnaire. The review describes the context in which the tools were developed, their similarities and differences and psychometric properties, and research regarding their relation to relationship outcomes. Further research is needed to determine the effect of using a pre-marriage inventory, alone or in conjunction with facilitated discussion and/or other marriage preparation activities, on long-term marital stability and satisfaction.