Mensans of the World Circle
- A webring for Mensan's personal pages, local group pages, or any site which has an association with Mensa.
- http://www.webring.com/hub?ring=mensans&list

TeenSIG
- The American Mensa special interest group for intelligent youth. Includes chat, bulletin board, articles, poetry and games.
- http://www.teensig.org

The Mensa Process
- Makes use of the intelligence and creativity of Mensa members to help companies develop new products, new promotional ideas and new business strategies.
- http://www.mensaprocess.com/

Mensa Under Water
- SCUBA and apnea diving with Mensa (Europe)
- http://piology.org/mensa-uw/

Mensa Education & Research Foundation (MERF)
- Charitable (501-C3) organization that is funded by American Mensa and other charitable donations.
- http://www.merf.us.mensa.org/