Anonymous likes for elements Can anyone help direct me to a plugin or way of anonymously liking articles?

I have used the Like plugin by Duct (https://dukt.net/craft/like) but unfortunately it must be associated to a user account to save the entry.
There's "Upvote" by Lindsey DiLoreto, which allows anonymous voting. Not sure though, if it makes use of cookies and/or logging of IP addresses to forbid people (read: make it harder for them) to vote multiple times.