OpenClipArt.org An archive of clip art that can be used without payment by anyone. All graphics submitted to the project are placed into the Public Domain.
BrowserShots.org An open-source online service that makes screenshots of your web design in different browsers. Provides screenshots for various Mac, Linux and Windows based web browsers.
CreativePro.com Offers a vast collection of information and resources for print designers, photographers, illustrators, Web designers and webmasters.
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.