RSData is a versatile toolkit for the analysis of rock and soil strength data, and the determination of strength envelopes and other physical parameters. RSData includes RocProp, a database of intact rock properties that runs as a standalone application. Determine the parameters of linear and non-linear strength envelopes for rock and soil, based on the analysis of triaxial or direct shear strength data. Utilize four of the most widely used strength models in geotechnical engineering - Generalized Hoek-Brown, Mohr-Coulomb, Barton-Bandis, and Power Curve. Failure envelopes are plotted in both shear-normal and principal stress space. Shear-normal stress envelopes generated can be applied to problems such as limit equilibrium analysis of slope stability, while the principal stress envelopes can be used for modeling the behaviour of underground excavations. RSData is a highly interactive program that allows users to easily test different strength parameters and observe how they impact a failure envelope, giving users a better understanding of material strength. The material strength properties determined can be used as input for numerical analysis programs such as RS2 and Slide2.