libxsmm

oneAPI Deep Neural Network Library (oneDNN)

? Highly Optimized 2D / 3D Graphics Math (glm) for C

C++ image processing and machine learning library with using of SIMD: SSE, AVX, AVX-512, AMX for x86/x64, NEON for ARM.

Performance-optimized wheels for TensorFlow (SSE, AVX, FMA, XLA, MPI)

Math library using HLSL syntax with multiplatform SIMD support

FlyCV is a high-performance library for processing computer visual tasks.

Portable wrapper for SIMD and vector instructions written in C++11. Compatible with NEON, SSE, AVX, AVX-512 and SVE (length specific).

Agenium Scale vectorization library for CPUs and GPUs

opencv

A supplementary SIMD math library to Unity.Mathematics, extending it to all C# numeric types while adding many new types and functions. Written entirely with hardware intrinsics, using Unity.Burst.