REAP (Relatedness Estimation in Admixed Populations) is a C program for estimating autosomal kinship coefficients and identity-by-descent (IBD) sharing probabilities using SNP genotype data in samples with admixed ancestry. The main reference for this program is


Thornton T, Tang H, Hoffman TJ, Ochs-Balcom HM, Baan BJ, and Risch N "Estimating Kinship in Admixed Populations" (2012) American Journal of Human Genetics, vol 91, pp. 122-138.