Links
Highly recommended is the World Intelligence Network IQ Test Center, where more than 580 IQ tests are presented. Each one of the IQ tests dedicated page includes a short description of the test, a working link to the test homepage and information about the type of the test (spatial, numerical, verbal, mixed), fees, supervision and time requirements.
IQ societies
List of active high-IQ societies 
IQ-chart
IQ portals
Uncommonly Difficult IQ tests
Genius Hall (requires Flash 6.0)
Glia Web
IQTest.sk
Aha! Puzzles
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