The number of C++ libraries and applications in computational science have grown over the past years. We will be presenting some of them and the advancements in the C++ standard that have contributed to this growth. The talks in this minisymposium will focus on the relevant aspects of the C++ standard and accompanying libraries. Additionally, practical aspects and implementation methods will be shown to deal with a wide range of computational science codes on many modern platforms in high performance manner. This will include HPC aspects of modern C++ and its impact of expresivity of the code. The talks will also include interfacing to modern Fortran code and how the integration between C++ and Fortran may be made easier or even completely automated.