There used to be one when photobucket was used by most of us.
However,, since their greed took over,, most of us dropped them.
You can go to 2 other very popular free sites & use them. I use "Postimage" most often,, and many use "Imgur". I have accounts with both. It's not hard to figure out if you have used a photo hosting site before. I prefer postimage due to the fact that I had an issue with imgur not allowing avatar pics. I had a discussion with the geeks there & I had found a place in their "agreement" which said they allowed avatars. When I went to find it again,, the very next day, it was gone. I stopped using them.
Basically,, you register,, then upload to them, then find the place to copy & paste to Forums!