Originally a way of recognizing the companies who developed technology for use in US space efforts, the Space Certification Program was eventually adopted in consumer products and other terrestrial applications. Examples of such technologies include heat shields, water filtration systems, and the famous zero-gravity space pen. This Web site highlights some of these certified products. Each description begins with the original purpose of the product and how it was used by NASA; then, the uses of the product on Earth are mentioned. The only drawback to this site is that not all of the products are accompanied by descriptions.