Sumopaint Is an online image editing software that allows you to create, open and edit images. Completed images can be saved to your account online or to your local computer. Slick and easy to use.
Smush.it Optimizes images by removing unnecessary bytes from a file without changing its look or visual quality. Run Smush.it on a webpage and get a report on bytes saved and a downloadable zip file with optimized images.
ShrinkTheWeb.com A free website thumbnail provider that allows your web page to capture images of any website's front page, homepage, or subdomain. Just type in the URL and get a thumbnail image of that web page. You can embed, download, etc.
FotoSearch.com FotoSearch.com provides access to 700,000+ images from over 50 stock photography, illustration, and video footage publishers at one website. High quality royalty free photos. Prices vary.
CSS3 Button Generator Lets you easily create new or preset buttons in CSS or HTML code. You can create the background color, borderadding width, drop/inner shadow, font color/size, etc.
Clip Art Warehouse Clip Art Warehouse has thousands of icons, animated gifs, animations, desktop icons, and more. Most are totally FREE to do with as you please. Definitely one of the best clip art image repositories on the Web.
TeamPhotoShop.com An excellent resource site for anyone wanting to learn more about using Adobe PhotoShop. The site has articles, tutorials, tips and tools related to PhotoShop usage as well as a helpful discussion forum.
Artvex.com Offers over 10,000 original fr'ee clipart images in 32 categories for non-profit personal use. Site isn't fancy but has some unique content.