- simd-everywhere/simde: Implementations of SIMD instruction sets for systems which don't natively support them.
- p12tic/libsimdpp: Portable header-only C++ low level SIMD library
- google/highway: Performance-portable, length-agnostic SIMD with runtime dispatch
- xtensor-stack/xsimd: C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions
- VcDevel/Vc: SIMD Vector Classes for C++