Click on the link under "C++ Program" on the menu to the left to download the latest version of the C++ port of Ncorr. The download is a .tar.giz file containing source files and CMake files. This C++ port requires a compiler that supports C++11. Currently, it has only been tested on Ubuntu 12.04LTS using g++ 4.8 and CMAKE 3.2 (Windows support is not available yet). The C++ port also requires FFTW, OpenCV, SuiteSparse, LAPACK, and BLAS. All the dependent libraries are available for free and are easy to compile and install on Linux. The download also includes a sample test file and CMake file for compiling executables using the Ncorr library.
Also on the menu to the left is the manual in .pdf form which includes installation instructions and some documentation on the program flow. I recommend viewing this manual (and also visiting the "DIC Algorithms" page) before using Ncorr.