Are you in need for free photos to be used in a presentation or publication? The internet is full of pictures of all kinds, but most of them cannot be used without paying a fee or infringing some copyright.

Noteable exceptions are wikimedia.org, the multimedia database of Wikipedia and freedigitalphotos.net, which offers royalty-free low-res images (400 px width).

You can limit your google picture search (which comes with a nice customable preview) to one of these sites by adding a “site:wikimedia.org” to the search field.

Free image from FreeDigitalPhotos.net