GUIGUW (Graphical User Interface for Guided Ultrasonic Waves) is an interactive program designed to calculate the dispersive properties of stress waves propagating in waveguides immersed in vacuum. Using GUIGUW, the user can easily identify and evaluate the possible acoustic waves existing in a wide range of structures. GUIGUW is developed in Matlab and compiled as a stand-alone software. The current version can be downloaded and used for free. Check it out!