The LEGaTO project received funding from the European Union's Horizon 2020 programme to create a software stack that optimizes for energy efficiency on heterogeneous computing platforms. The project aims to start with mature European software and optimize it to support energy-efficient computation on hardware with CPUs, GPUs, FPGAs, and FPGA-based dataflow engines. Key partners include universities and companies developing hardware and software. The project will develop programming models, runtime systems, and use cases in areas like healthcare, smart homes, and machine learning to demonstrate the stack.