The views_popup module adds popup style support for a Views List View. This version is actually listed as "List View as Popup". This module requires the Views module.
7.x-3.x is in beta, looking for feedback
6.x-3.x is in alpha, looking for feedback
6.x-2.x is in bug fix mode
5.x is no longer maintained
There is no upgrade path between major revisions because of architectural changes.