Split and Recombine Your Data (taber)
Sometimes you need to split your data and work on the two chunks independently before bringing them back together. ‘Taber’ allows you to do that with its two functions.

Community Ecology Package (vegan)
Ordination methods, diversity analysis and other functions for community and vegetation ecologists.

Mining Association Rules and Frequent Itemsets (arules)
Provides the infrastructure for representing, manipulating and analyzing transaction data and patterns (frequent itemsets and association rules). Also provides interfaces to C implementations of the association mining algorithms Apriori and Eclat by C. Borgelt.