Tineye is a great picture finding tool. Simply put your mouse pointer on the picture or image, right click and then click the TinEye form the list and let the tool do the work for you. In the example below I used my Facebook picture and did a TinEye search.
As you can see it shows every place were this same picture can be found
The Good: Nice tool and a good alternative to Google image search or better using both to ensure you get the best results
The Bad: Like any image search not 100%, also would be good if it told us the odds on the image being fake.
The Ugly: NA
Final Verdict: 4 / 5