Plugin Problem After 3.6

I was using a social media plugin which started acting oddly after I upgraded the site to 3.6. I deactivated and deleted the errant plugin. Or, so I thought. It still appears on my posts. I’ve tried flushing all my caches, to no avail.

The embarrassing thing is that I don’t remember the name of the plugin as it no longer appears in my list of installed plugins, so I can’t determine what it is called and try to find it in the code

Can anyone identify it from this picture?