There are a few R-packages where I am maintainer or to where I contributed:
GenomicTools: A loose collection of tools for the analysis of expression and genotype data, currently with the main focus on (e)QTL and MDR analysis.
gMWT: Generalized Mann-Whitney type tests based on probabilistic indices and new diagnostic plots.
hoardeR: Information retrieval from National Center for Biotechnology Information (NCBI) databases, with main focus on identifying genes in unannotated organisms via Blast similarity search in annotated organisms.
Luke: Another loose connection of helpful, repeating functions.
OjaNP: Functions to calculate the Oja median, Oja signs and ranks and methods based upon them.
REPPlab: An R Interface to ‘EPP-lab’ v1.0. ‘EPP-lab’ is a Java program for projection pursuit using genetic algorithms written by Alain Berro and S. Larabi Marie-Sainte and is included in the package. The ‘EPP-lab’ sources are available under https://github.com/fischuu/EPP-lab.git.