SHAKYGROUND is a software tool designed to provide the earthquakes effects estimation in urban, industrial areas and cities. It provides the user a friendly environment allowing the simulation of strong ground motion by means of synthetic simulation of acceleration seismograms and the estimation of seismic load in a given area. It forms the seismological base for the design of earthquake-resistant buildings and for land use planning. Moreover, it allows the identification of sites where the expected ground shaking is severe; this can be useful for emergency planning, as well as for enhancing earthquake awareness. Strong ground motion is seriously affected by wave propagation effects caused by changes due to absorption, reflection and refraction at the boundaries of the geological structures. The software tool incorporates concepts of the seismic source process and wave propagation effects which are well confirmed by numerous scientific studies and practical applications. The problem of seismic load estimation is approached by means of synthetic simulation of acceleration seismograms, that gives the possibility to account for the specific geological site conditions and the characteristics of the seismotectonic zone. SHAKYGROUND provides the user with a user friendly interface for tackling the complex problem of the assessment of seismic hazard. The user interface allows to enter input values related to: - the seismic source parameters - the geotechnical parameters - the calculation of response spectra - some general information concerning the operation of program and its output. SHAKYGROUND is a software that runs on Microsoft Windows operating systems (95, 98, NT, 2000, XP, VISTA, Windows 7) and is based on the .NET 2.0 Framework and Visual Basic programming language.