(Always check the terms in case anything’s changed since I originally reviewed these websites and their policies.)
Free Photograph Sources
Unsplash – This site adds new images daily. High-resolution photos. Really interesting choices.
Morgue File – Easy to use, has a nice library and includes a tool to crop and resize the photos you want to use.
Stock.xchng – Big selection of images, terms vary from photo to photo.
Every Stock Photo – Library includes photos from NASA and the Library of Congress.
Dreamstime – This is a royalty free (paid) photo site but they also have a collection of free images.
Free Digital Photos – Love the way the categories are setup here, easy to browse. Includes photos & illustrations.
Creative Commons – Here you can search Flickr, Wikimedia, and other sites for Creative Commons licensed images.
Unprofound – Here you can search images by color, which is very cool if you need something based on color.
Free Range – Very nice selection of free photographs.
Image*After – You can find free images and free background textures here.
Photogen – Another nice catalog of photographs.
NOAA – Lots of landscapes and nature photos from NOAA.
Uncle Sam’s Photos – More free to use photos from the US Government.
Free “Create Your Own” Image Sources
Wigflip – Wigfip allows you to generate various graphics with your own text on them.
Wordle – This site lets you create a “cloud” of words from any text or feed you’d like. You choose the colors, fonts & style.
Flaming Text – Set your text on fire, make it brushed metal, or try one of dozens of other effects.
Cool Text – Similar to Flaming Text but also allows you to put your text on buttons like this panic button.
Fake Magazine Cover – Put yourself (or any photo you’ve got) on the cover of dozens of different magazines.
Free Clip Art Sources
Public Domain Photos – If you’re looking for clip art style images, try this site. Also has photos.
WP Clipart – More clip art style images.
Hassle Free Clip Art – Large selection of cartoons and clip art.