- EvolveFish.com
 - Offers Darwin fish, books, emblems, stickers, posters, T-shirts, and other products promoting rational thought. - O & P Designs
- T-shirts featuring infectious disease subjects: parasitology, Lyme disease, plague, sleeping sickness, schistosomiasis, etc.
- Cotton Expressions, Ltd.
- T-shirts with astronomy, physical science, science cartoon, and animal themes.
- M folz
- Offers ready-to-wear irony in the form of humorous T-shirts, many of which have scientific subject matter.
- YellowIbis.com
- Sells scientific and historical antiques, reproductions, and quality products. YellowIbis offers science themed t-shirts, mugs, bags, and other novel items.
- I Believe in Science
- T-Shirt sporting a tree of life design to share your belief in science and evolution with all your friends and admirers.
- Purely Akademic
- T-shirts with science, math, and computer humour.
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