EXIF Metadata Reader: Paste the URL to extract exif data from any jpg online photo.
FotoForensics: Submit a JPEG or PNG for forensic analysis.
Google Images: To do a reverse search, click on the small camera icon and put in an image's URL or you can paste or upload your own image.
Image Edited?: Analyzes images to see if they are edited or photoshopped. Exif and pixel tests tell if the photo is original or modified. Exif Viewer shows the full raw exif data for your image.
ImgOps: Image operations meta-tool.
izitru: Free image hosting that can prove your photo is real.
JPEGsnoop: Detailed JPEG image decoder and analysis tool. It reports all image metadata and can even help identify if an image has been edited.
TinEye: Reverse Image Search: Find other places a photo has appeared online.
Tracker: Video analysis and modeling tool.
YouTube DataViewer: Enter a YouTube URL to extract the metadata.