PoliteMail gives you the option to export Mailing Lists to an Excel spreadsheet.
From the PoliteMail ribbon, choose Mailing Lists.
By default, PoliteMail exports all lists displayed. If you need to narrow down your lists, there are a few options. You could change the All Users pull-down menu to only show lists that have been created by you or a particular user.
You can also use the Search tab to narrow your displayed options by name.
Once you have the lists displayed, go to Actions > Export All.