Kratos Multiphysics (A.K.A Kratos) is a framework for building parallel multi-disciplinary simulation software. Modularity, extensibility and HPC are the main objectives. Kratos has BSD license and is written in C++ with extensive Python interface.

CSC Summer School in High-Performance Computing

Fast multi-thread FEC simulator & library of efficient digital communication algorithms for SDR.

An adaptive and distributed-memory parallel implementation of the immersed boundary (IB) method

Main repository for QMCPACK, an open-source production level many-body ab initio Quantum Monte Carlo code for computing the electronic structure of atoms, molecules, and solids with full performance portable GPU support

DMTCP: Distributed MultiThreaded CheckPointing

Particle-in-cell code for plasma simulation

C++ library for solving large sparse linear systems with algebraic multigrid method

🔬 Assemble large genomes using short reads

QUDA is a library for performing calculations in lattice QCD on GPUs.

SST Structural Simulation Toolkit Parallel Discrete Event Core and Services

🍇 A C++ library for parallel graph processing (GRAPE) 🍇

LargeScale Multiphysics Scientific Simulation Environment-OneFLOW CFD

TCLB - Templated MPI+CUDA/CPU Lattice Boltzmann code

A flyweight in situ visualization and analysis runtime for multi-physics HPC simulations

High-performance stateful serverless runtime based on WebAssembly

parallel finite element unstructured meshes

RAxML Next Generation: faster, easier-to-use and more flexible

The Arbor multi-compartment neural network simulation library.

Parallel algorithms and data structures for tree-based adaptive mesh refinement (AMR) with arbitrary element shapes.