The award-winning Xcelerit SDK is a software toolkit to boost the performance of compute-intensive applications while preserving programmers’ productivity. From a modified sequential source code – free from any parallel constructs, low-level compiler directives, etc. – the Xcelerit SDK can generate highly optimised code for a variety of target processors. These include GPUs, many-core procesors – and combinations of these in a grid. The programming interface is intuitive and suitable for many classes of algorithms, e.g. Monte-Carlo, Finite-difference, or Lattice-based methods. The Xcelerit SDK is targeted at domain specialists performing heavy computations with the need for a flexible in-house solution. Users can focus on the core of their algorithm and the problem at hand, and yet they can generate high-performance programs.