| Astronomical Society of Greenbelt: Sharing and educating people about the science and hobby of astronomy. Events, history, projects and membership information. |
| Greenbelt Community Website: Offers events calendar, business directory, homes and other useful information. |
| Knights of Columbus, Council No. 10885: The St. Hugh Council of Greenbelt, Maryland who initiated the Maryland State Model Rocket Youth Activity, have their history documented along with a listings of their activities. |
| Partnership for Animal Welfare (PAW): A group of volunteers who facilitate the rescue of homeless domestic animals, mainly cats and dogs, and place them into loving and stable homes. Adoption shows are held in the suburban Maryland area. |
| Virtual Greenbelt: Chronicles the town's history as a New Deal-era planned community. Includes architectural drawings, photos, oral histories, and links to related materials. |
| WestieMed: West Highland White Terrier Medical Assistance is a non-profit organization created to distribute financial aid to injured or ill rescued Westies. |
| Wikipedia - Greenbelt, Maryland: Free encyclopedia with history, geography and demographics. |
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