LD-Plus is a data visualization application for the display of single SNP statistics in the context of linkage disequilibrium and haplotype structures. LD-Plus can display both continuous and categorical SNP statistics, and is designed to parse Haploview output to display both D’ and r2 LD plots, called or user-defined haplotype blocks, and haplotype frequencies. This web application will run Haploview and use the output to generate the plots.