BackTrack Safari Extension is an extension for Safari that enables you to right-click images to find out where else they appear on the web, or click the toolbar item to search for all the images on a page.
Search Engines:- TinEye - "Reverse Image Search"
- Google - "Search by Image"
- Bing - "Image Match"
- KarmaDecay for Reddit.com users
- IQDB & SauceNAO for Anime/Manga