This module offers a simple and consistent file upload interface that works with CGI.pm, CGI::Simple, and potentially other CGI.pm-like modules. It also offers an easy interface to the mime-type of the uploaded file, detected using File::MMagic.
Recently, a strong test suite has added as well.
I think it's most useful for people who are writing file upload systems that they might want to work with multiple CGI.pm-like modules.
Otherwise, it may be simpler to use use the upload routines already built-in to those modules, and call File::MMagic directly.