The best free software to use in designing a kitchen would be SketchUp Free, Planner 5D, Roomstyler 3D, IKEA Kitchen Planner, HomeByMe, Sweet Home 3D, Floorplaner, Homestyler, SmartDraw (trial version), and Prodboard Online Kitchen planner. The tools enable the user to create layouts, test the design of the cabinets, insert appliances, and create a 3D preview of the designs. They are useful in planning fast, visualizing, and trying various styles of kitchens.