Special Volume: Software for Spatial Statistics (Editors: Edzer Pebesma, Roger Bivand, Paulo Justiano Ribeiro)

Special Volume: Numerical Optimization in R: Beyond optim (Editor: Ravi Varadhan)

Special Volume: Graphical User Interfaces for R (Editors: Pedro M. Valero-Mora, Rubén D. Ledesma)

Special Volume: Psychoco: Psychometric Computing in R (Editors: Florian Wickelmaier, Carolin Strobl, Achim Zeileis)