SLAMMER is a Java program that facilitates performing a variety of sliding-block analyses to evaluate seismic slope performance. Functionalities include both rigorous and simplified analyses of rigid sliding blocks (i.e. Newmark analysis) and flexible sliding blocks (i.e. decoupled and fully coupled approaches). Both rigorous and empirical simplified methods are included in the program. More than 2,100 recorded ground motions from the PEER Ground Motion Database are included with the program, and users can import their own ground-motion records for analysis.