landscape – Set up for typesetting in landscape
The landscape package is long superseded by the geometry package, which has sophisticated controls on page layout.
Maybe you are interested in the following packages as well.
- portland: Simple portrait/landscape switching
- cropmrks: Add crop marks to a Plain TeX document
- acmproc: Style option for ACM proceedings
- exam209: Process exam questions and answers (LaTeX 2.09)