We have developed a set of “design principles” to guide the development of new creativity support tools – that is, tools that enable people to express themselves creatively and to develop as creative thinkers. Our goal is to develop improved software and user interfaces that empower users to be not only more productive, but more innovative. Potential users of these interfaces include software and other engineers, diverse scientists, product and graphic designers, architects, educators, students, and many others. Enhanced interfaces could enable more effective searching of intellectual resources, improved collaboration among teams, and more rapid discovery processes. These advanced interfaces should also provide potent support in hypothesis formation, speedier evaluation of alternatives, improved understanding through visualization, and better dissemination of results. For creative endeavors that require composition of novel artifacts (e.g., computer programs, scientific papers, engineering diagrams, symphonies, artwork), enhanced interfaces could facilitate exploration of alternatives, prevent unproductive choices, and enable easy backtracking.