This is a fortran code written by Lam Hui to compute the peculiar velocity two-point correlation, and the assoicated contribution to the magnitude covariance between two standard candles (such as SNe Ia). The code also contains portions useful for computing power spectrum, growth factor and cosmic distances. If you use this code, please acknowledge the paper L. Hui, P. B. Greene, Phys. Rev. D73, 123526 (2006) [arXiv:astro-ph/0512159]. Instructions for using this code can be found in the README file after you download this tar ball. A short note explaining the basic expressions can be found here. You might also want to consult a paper by T. M. Davis et al. (2010) [arXiv:1012.2912].