How To Check If Someone Is Using/stealing Your Work

Thank you Al. This has been mentioned several times here but is always worth reminding people about

Google reverse image search is also very good http://images.google.com

Both of these can find your images if online :)

Again, thank you for sharing

Both are excellent - always worth mentioning again. Thanks!

I think google image search is much better. Tineye never gives but one or two results, sometimes none where google gets MANY hits.