heterozygosity          calculate the number of heterozygous SNPs for
                        each sample
vcfpopgen               count the heterozygous sites per sample in the
                        VCF/BCF
vcfppR-package          vcfppR: Rapid Manipulation of the Variant Call
                        Format (VCF)
vcfreader               API for manipulating the VCF/BCF.
vcfsummary              summarize the various variant types at both
                        variant level and sample level.
vcftable                read VCF/BCF contents into R data structure
vcfwriter               API for writing the VCF/BCF.
