Slides for conference talk with no affiliation It is (of course) a rule that the speaker's affiliation appears alongside their name in their presentation at a conference. 

What's the best practice in the case of no current affiliation? Did you have personal instances, either as speaker or audience? 

(Please note: The question is not about publications, which has already been discussed e.g. here.) 

EDIT: 

Saying that one can simply write their name and nothing else should be obvious and straightforward to everyone. What the question is about is suggestions that either look better than this "trivial solution", or address the fact that it is unusual.
I will base my answer upon a statement from the OP's comments:


  In a conference though, mentioning an affiliation which is not current would be a quite serious mistake.


As I have expressed before in another answer, I do not see any reason why an "affiliation" needs to be something explicitly formalized, or why affiliations need to be mutually exclusive.
As such, I disagree with the above statement.

At least in fields where the conference paper is an actual publication, and the presentation is simply a part of paper publication via the conference, basically, the author details (including affiliation) in the conference presentation on a paper should be the same as those indicated on the paper.
Some information can be added, though:


The author who presents the paper in the conference may be highlighted.
If someone other than one of the authors presents the paper, their name may be listed on the presentation (in such a way that it is clear they are the presenter and none of the authors).
And, to address this question, if someone would like to update their contact or other details, they can indicate the changes during the presentation.


Lastly, for what it's worth, when you present a paper on a conference and that paper was created as a part of your work in your previous job, you are affiliated with that previous employer by the very act of presenting on behalf of your former position.

Therefore, I suggest the following course of action:
List your affiliation as it is stated on the paper.
Next to that, add something like "(now independent researcher)".