We present a comprehensive report of our work in the design and implementation of systems that combine holography with haptic feedback. Two separate holo-haptic systems are described. First, we describe a static system wherein a user can see a free-standing static holographic image and inspect its shape using a force-feedback stylus. In the second system, visual display is provided by a dynamic holographic video system, and the user can modify the geometry of the image in near real-time. We also suggest a preliminary set of guidelines for presenting physically believable multimodal simulations in coincident visual-haptic workspaces.