Looking for F/OSS software to manage voter lists, and GOTV efforts

I have a friend up here in the Great White North who is in search of open-source software that would help with documenting voter intent and “get out the vote” (GOTV) efforts. Given that this friend is a CiviCRM consultant, I would guess that’s already on the list (or off the list). Maybe you’ve seen something out there recently that is similar to what AdvoKit was trying to do?