This is why search on CPAN (as useful as it sometimes is) is not always helpful. There are two different search engines on cpan (search.cpan.org and kobesearch.cpan.org). Searching for 'ESRI' on search.cpan.org doesn't return anything because there aren't any modules that have the word ESRI as part of the module name. The kobesearch engine searches the content of module documentation, and searching there for 'ESRI' turns up several modules that mention it, but returns different modules depending on what you search. Searching kobesearch for 'ESRI' in 'Distributions' returns Geo::Shapelib and XML::Generator::SVG::ShapeFile. Searching in 'Modules' returns those two plus Geo::E00. Neither search finds my own Geo::ShapeFile module, which I know mentions ESRI in the documentation several times.