CUDA
SYCL – an open standard from Khronos Group for programming a variety of platforms, including GPUs, with single-source
modern C++, similar to higher-level CUDA Runtime API (single-source)
BrookGPU – the Stanford University graphics group's compiler
rCUDA – an API for computing on remote computers
Vulkan – low-level, high-performance 3D graphics and computing API
OptiX – ray tracing API by NVIDIA