R is very powerfull but not enough for social science
becouse of lack in some functionality for managing
survey data SPSS or Stata provides. Memisc package
supplements these, variable labels, value labels,
definable missing values and so on, but to efficiently work
these functions need graphical interface to overlook data.
This package provides such graphical interface similar to
SPSS's Variable View and data managing system using memisc
package as backend. Additionally, Rz has powerful plot
assistant interface based on ggplot2.