- The Cerebrals Society
- Professionnal IQ tests, free intellectual discussion boards with individuals with an IQ at or above 144.
- High IQ Society
- An online community of intelligent persons.
- Intertel
- An organization of those with IQ scores in the top 1% of the population (99th percentile). Members can enjoy the companionship of others of similar abilities who share their ideas and insights.
- Intertel Region VIII
- Helps meet those needs for individuals with an intelligence quotient at or above the 99th percentile.
- IQuadrivium Society
- A high IQ society for those at and above the 99.9th percentile.
- The Mega Society
- An international ultra-high IQ society with an educational, scientific, and research focus.
- Prometheus Society
- Educational, scientific, and research group for those with extreme intelligence.
- SesquIQ
- High IQ society. Membership active in environmentalism and research.
- The Vitruvian Society
- A society for those with high intelligence and the innate ability to acquire a multitude of new skills quickly and easily.
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