[nbm]

The App Settings page will tell you when last you used it, and when last they accessed information (once you click on "Edit").

If you are truly concerned about this happening behind your back (rather than making a comment about how easy it is to not recall adding something), you can contact me (neilblakeymilner at fb.com) and I will try connect you with someone who might be able to help you find out when you did it and whatever other information might be attached to that event (I don't really know what, if any, we keep on that event type).

[cousin_it]

I just went to my App Settings page and also found multiple apps that I know for certain I didn't authorize.

[nbm]

Feel free to contact me as well if you are sure that you didn't authorize them. I am not sure I can help, but I will try.

There are only a select few applications that get authorized automatically when you use them (Instant Personalization - https://www.facebook.com/instantpersonalization/), but they only get read access to some basic information that you share with "Public", and they have to follow pretty stringent guidelines in terms of how they store and use the data, and they have to show you how to opt out of the experience when you visit.

This probably is not the case with you, but sometimes people find out that some browser plugins (even ones that do useful things, not just "show who viewed your profile" types) that they are using do malicious things, or discover that their credentials were compromised due to phishing or because of a password dump when they report weird things like this (although the team I'm on do try our best to prevent both of these sorts of things).

[brown9-2]

Isn't it vastly more helpful for everyone involved and reading this to name those apps?