The getting started section of the documentation provides a brief
introduction to using the Wolfram Workbench.
More information about what the Wolfram Workbench is and how
it fits with other Wolfram technologies can be
http://www.wolfram.com/products/workbench. In addition,
some screencasts are available at
http://www.wolfram.com/products/workbench/screencasts. These give
live demonstrations of how the Workbench can be used.
Documentation for Mathematica can be found at the
Wolfram documentation site,