R package fasterRaster is an add-on to the popular raster package. Harnessing GRASS GIS, it easily handles large rasters.

R package enmSdm streamlines calibration of species distribution models, evaluation of niche overlap, and correcting for spatial sampling bias. Biotic velocity? Done. Eliminating duplicate records in a raster cell? Done. Weighted versions of AUC, Continuous Boyce Index, Fpb, and the True Skill Statistic? It’s all here!