Matrix Shadow:Lightweight CPU/GPU Matrix and Tensor Template Library in C++/CUDA for (Deep) Machine Learning
GPU Matrix Library - A CUDA-based C++ wrapper and syntax sugars for NVIDIA CUBLAS
ArrayFire: a general purpose GPU library.
Hands-On GPU Accelerated Computer Vision with OpenCV and CUDA, published by Packt
An example application that demonstrates how to detect which Intel CPU and GPU is present, as well as architecture-specific information such as how much memory is available.