Food
A huge selection of free food clip art, plus other theme specific clip art
http://www.clipartguide.com/clipart_food.html
Food 2
Skyzer's resource of hand drawn food clip art with some free food clipart, original menu designs, recipes, clipart for the food industry, a nice selection of clip-art - great clip - art
http://www.clipartists.com/
Holidays
A huge selection of holiday clip art, plus other theme specific clip art
http://www.clipartguide.com/clipart_holidays.html
Flowers
A huge selection of flower, fruit and plant related clipart, plus other theme specific clip art
http://www.clipartguide.com/clipart_flowers.html
Computer
Free computer, office, business and school clipart. a large selection of images and an index to similar sites on the web.
http://www.clipartguide.com/clipart_computer.html
Animals
Tons of animal clip art, pictures and photos categorized so you can find what you need quickly and easily.
http://www.clipartguide.com/clipart_animals.html
Cartoons
Cartoon character clip art, plus other theme specific clip art
http://www.clipartguide.com/clipart_cartoons.html
Logos
A large selection of logo clipart...sports teams, corporate, organizations...plus other theme specific clip art
http://www.clipartguide.com/clipart_logos.html
Misc.
A huge selection of misc clip art, plus other theme specific clip art
http://www.clipartguide.com/clipart_misc.html
Transportation
Transportation related clip art - car clipart, trucks, boats, planes - plus other theme specific clip art
http://www.clipartguide.com/clipart_transportation.html
Travel
A huge selection of travel related clip art, plus other theme specific clip art
http://www.clipartguide.com/clipart_travel.html
Science
A huge selection of science related clip art, plus other theme specific clip art
http://www.clipartguide.com/clipart_science.html
Religious
Christian, and other religious clip art, plus a guide to other religion clipart sites on the web.
http://www.clipartguide.com/clipart_religious.html
People
A wide selection of people related clip art & pictures, plus other theme specific clip art
http://www.clipartguide.com/clipart_people.html
Photographs
Find scans, pictures, and photos on almost any subject, plus other theme specific clip art images. this page contains: space shuttle and planet earth; grand canyon; old man; farmer
http://www.clipartguide.com/clipart_photographs.html
Web
The whole internet clipart guide has all the web graphics and clipart you could ever hope to find.
http://www.clipartguide.com/clipart_web.html