spack / spack

A flexible package manager that supports multiple versions, configurations, platforms, and compilers.

mfem / mfem

Lightweight, general, scalable C++ library for finite element methods

llnl / zfp

Compressed numerical arrays that support high-speed random access

hypre-space / hypre

Parallel solvers for sparse linear systems featuring multigrid methods.

llnl / sundials

Official development repository for SUNDIALS - a SUite of Nonlinear and DIfferential/ALgebraic equation Solvers. Pull requests are welcome for bug fixes and minor changes.

llnl / RAJA

RAJA Performance Portability Layer (C++)

visit-dav / visit

VisIt - Visualization and Data Analysis for Mesh-based Scientific Data