Packages by Russell Lenth

emmeans — 1.4

Estimated Marginal Means, aka Least-Squares Means

estimability — 1.3

Tools for Assessing Estimability of Linear Predictions

lsmeans — 2.30-0

Least-Squares Means

rsm — 2.10

Response-Surface Analysis

unrepx — 1.0

Analysis and Graphics for Unreplicated Experiments