Finding graphics can be a problem for any webmaster. Fortunately, there is plenty of clip art and web graphics websites and software packages. There are also artists online that offer graphic and clip art for a fee. You might try a web search to find an artist. Flickr also has a wide variety of photos -- some of which can be used by giving the photographer an attribution.

If you want to make your own graphics, Adobe has some great general advice is an article about creating web graphics using Illustrator.

Here are some resources that provide web graphics and clip art. Be sure to carefully read the terms before you use any art, pictures or photos you find online.

A1 Icon Archive

ABC Graphics

Animated Gif Artists Guild

Clipart.com

Clip Art Connection

Clipart Library

Cool Archive

Cooltype.com

Font Freak

Fonts.com

FreeGraphics.com

FreeImages.com

The Free Site -- Webmaster Freebies

Gfycat - find and create animated GIfs

GifArt.com

Giphy - a great source for embeddable animated gifs

I-US (Grapics)

iStockPhoto.com

The Internet EYE Magazine

Leo's Icon Archive

Media Builder

Mike's World

phong

Photos.com

3D Cafe

TuDogs.com

w3schools: HTML Graphics - describes how to create graphics with SVG and Canvas HTML elements.