ACE Intelligence Website - Free IQ tests, including an official test and weekly changing tests.
Alpha Omega IQ Links - Links to various free online IQ tests.
Business and Employee I.Q. Tests - Free test for employees and businesses. For more accurate results, an official test is obtainable.
Cognitive Reasoning Register - Measurement of ability to learn, solve problems, and intellectual acuity. Often used pre-hire for management and IT professional assessment.
Daily IQ Test - Daily changing IQ-style questions of diverse nature for fun and learning purposes.
Davideck IQ Tests - The IQ Tests page of Dave Desk's Personality and IQ Tests portal. Each quiz has a rating.
Difficult IQ tests - Comprehensive list of IQ tests and IQ societies.
Emode's Ultimate IQ Test - Free Ph.D. certified test. You get a 15-page personalized analysis.
Encephalist-R22 - High-range test downloadable as PDF file; web site contains statistics for the test.
European IQ Test - Free online IQ test.
Fast Comprehensive IQ Test - Short online IQ test.
Foritensum - A very difficult culture-fair test.
2 Free Online IQ Tests - Answer 40 questions in 30 minutes and receive an analysis with your IQ.
GliaWeb - IQ testing in Dutch and English offered along with IQ Society membership. Includes: links, games, and newsletter.
Hangar Z's BrainStorm - This site uses scientificly proven principals to help stimulate your thought process. Part of the Hangar Z Network
In-Depth IQ Test - Free 12-minute test.
Intelligence Tests - List and rating of IQ tests available online.
International High IQ Society - Professional free online IQ tests; you can choose between Flash and HTML version. Membership possible.
IQ Test - Professional IQ Test with the option of acquiring a Certificate of Accomplishment.
IQ Test Labs - Free online IQ test with 10-minute timer and automatic scoring.
IQ Tests - Online IQ tests for various age categories. Russian site, but in English.
IQ Tests - Directory of intelligence tests of varying psychological validity; includes brief description and estimated time required for completion.
Know yourself better - An IQ level indicates how one is positioned compared to the majority of individuals in a given age bracket.
PsychTest.com IQ Tests - Collection of free professionally developed intelligence tests, such as verbal IQ, spatial IQ., visual memory test, culture-fair IQ, logic, and concentration.
Queendom IQ Tests - Various Professionally Designed Online IQ Tests.
Quick IQ TEST - You get a title and image to go with your score.
Self-Discovery Workshop IQ test - Online IQ test with information on intelligence testing and history thereof.
Sentence Completion Test - Assesses English vocabulary knowledge. Presented as an experimental form
of a verbal IQ test.
Sigma Test - Admission test for several high-IQ societies. Contains sections with various levels of difficulty.
SON-R Nonverbal Intelligence Tests - Individual tests for children not requiring use of language. Especially suited for children with problems in the areas of language and verbal communication. Norms available for ages 2 to 17.
Startkabel IQ Links - Links to IQ tests in various languages.
Test of Intelligence VX20 - Untimed high-range IQ test.
Test of Logical Abstractive Perception - Overview of its psychometric properties and links to the test itself.
Tests Of Intelligence - Various types of IQ tests to test yourself.
TOI - Contains special and combined IQ tests and links to IQ and EQ sites.
Ultimate IQ test link site - Over 100 links to IQ tests in various languages.
Uncommonly Difficult IQ Tests - Large variety of IQ tests, links to HIQ organizations, articles about intelligence.