NiftySim is a light-weight, cross-platform finite-element modelling package. NiftySim contains nVidia CUDA and C++ implementations of the Total Lagrangian Explicit Dynamics (TLED) algorithm and several non-linear constitutive models making it suitable for the fast and accurate simulation particularly of soft-tissue biomechanics. Numerous extensions to the basic TLED have been made as well, such as the addition of contact models, and membrane and shell elements. Contributors include Zeike A. Taylor, Stian F. Johnsen, Matthew J. Clarkson, John Hipwell, Johannes Totz, Marc Modat, Bjoern Eiben, Lianghao Han, Yipeng Hu, Thomy Mertzanidou, David J. Hawkes, and Sebastien Ourselin 

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