| Baltimore Ferret Club | | Statewide group aiming to promote and support the domestic ferret. Site includes activity and membership information, mailing list, links, veterinarian and breeder directories, ferret care advice. |
| Baltimore Radio Amateur Television Society | | Provides support and networking for amateur radio and amateur television (ATV) communities through emergency communications, public service, education, and experimentation. Sponsors the annual BRATS Maryland Hamfest and Computer Fest. |
| GO-AdventureSports | | Specializing in custom teambuilding, ropes courses, climbing, caving, mountain biking, and orienteering instruction. Programs and instruction for youth and adults. |
| Maryland License Plates | | Presented by Al Virta. Features a photo collection and overview from 1952 to the state's 350th anniversary plate. |
| Maryland Orchid Society | | Brings together people interested in orchids to promote and encourage orchid culture, preservation, education propagation, hybridization, and all other orchid-related activities of interest to its members. Events calendar and fall auction are featured. |
| Maryland Scholastic Hockey League (MSHL) | | A boy's and girl's youth ice hockey organization managed by volunteers from all walks of life. MSHL high school level ice hockey program is affiliated with the Southeastern District, USA Hockey. |
| Mid Maryland Triathlon Club | | Offers activities, social events, clinics, and workouts for beginning to experienced tri-athletes. Features membership information, upcoming races and results, and a forum. |
| NAWCC Free State Chapter 141 | | National Association of Watch and Clock Collectors. Features chapter news, events, officers, meeting locations, and contacts. |
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