Sunil Kappal demonstrates how to use Deducer, a GUI for R, to perform a simple linear regression:

Selecting the variables in the Deducer GUI:

**Outcome variable**: Y, or the dependent variable, should be put on this list**As numeric**: Independent variables that should be treated as covariates should be put in this section. Deducer automatically converts a factor into a numeric variable, so make sure that the order of the factor level is correct**As factor**: Categorically independent variables (language, ethnicity, etc.).**Weights**: This option allows the users to apply sampling weights to the regression model.**Subset**: Helps to define if the analysis needs to be done within a subset of the whole dataset.

Deducer is open source and looks like a pretty decent way of seeing what’s available to you in R.