Competitions:

1. Contest 2023 by Theodosis Prousalis: https://hriqtests.com/contest-2023/ until December 31st 2023

2. The Übermensch by Domagoj Kutle: https://highiqtests.com/the-%C3%BCbermensch-contest until January 31st 2024

3. Prize of the Beheaded Man by Paul Cooijmans: http://iq-tests-for-the-high-range.com/prize_behead.html  until December 21st 2025

4. World I.Q. Challenge by Brennan Martin: http://www.worldiqchallenge.com/  until perfect score is reached

Recommended tests:

2. Mathodica 22 by Mislav Predavec: http://news.generiq.net/Mathodica22/mathodica22.html

3. Labyrinthine LIMIT by Paul Cooijmans: http://iq-tests-for-the-high-range.com/labyrinthine_limit.html

4. Challenger by Zoran Bijač: https://globeiq.net/challenger-2/

5. APT by Wei ZiQin: http://apt-1.mysxl.cn/

6. Human Intelligence Test by Brennan Martin: http://www.worldiqchallenge.com/human-intelligence-test.html

7. Tests by Domagoj Kutle: https://highiqtests.com/

8. TetrastIQ Light by Gabriel Garofalo: https://tetrastiqlight.weebly.com/

9. LDA-SWaN by Gianluigi Lombardi: https://ldaswantest.wixsite.com/iqtest

10. Tests by Randy Myers: https://i-qtest.com

11. Tests by Marco Falchi: httpshttps://marcotests.weebly.com/://marcotests.weebly.com/

12. Three Sonnets by Heinrich Siemens: http://tweeback.com/hriq/Three-Sonnets.pdf

IQ score listings:

GENIUS High IQ Network: http://www.geniusiqnetwork.org/scores

Gifted High IQ Network: http://www.giftediqnetwork.org/iq-scores

Global Genius Registry: https://globalgeniusregistry.org/

Global Genius Directory: https://geniusdirectory.org/

Hall of IQ scores: http://topiqscores.weebly.com/iq-scores.html

HRIQ Ranking List: http://rank.hriq.org/

High IQ Database: https://highiqcommunity.com/iq-scores/

Mahir Wu Ranking List: https://mahirwu.wixsite.com/iqtests/rank-1

VeNuS Ranking List: http://venushighiqsociety.org/index.php/members

World Famous IQ Scores: http://www.ultimaiq.net/list.html

World Genius Directory: http://psiq.org/home.html

World Genius Registry: https://worldgeniusregistry.org/

World Highest IQ Scores: http://scores.generiq.net/

World`s Highest IQ`s: https://worldgeniusdirectory.org/

GFIS IQ List: http://www.tlgstoh.com/forum.php?mod=viewthread&tid=420&extra=page%3D1

WIQF Listing: http://wiqf.org/wiqf-ranking/

Real IQ Listing: http://iq.ultimaiq.net/

Other interesting links:

Hiqora: http://www.hiqora.com/

GCHQ (Puzzle Championships, follow newsfeed for future events)

World Puzzle Federation: http://www.worldpuzzle.org/

Cryptography tools: http://www.dcode.fr/tools-list

Polymathica - Global community dedicated to intellectual sophistication

Kirk Raymond Butt`s web sites: https://www.highrangeiqtests.org/ and https://globalgeniusregistry.org/

Christian Backlund`s  web-sites : http://www.zollydarko.com/ and https://www.zollysite.com/ 

Christian Backlund`s books: The Sufferings of Jack Hyde and Messiah of the Fallen Paradise

Andrew Hayles`s website: https://www.andrewhayles.com/home

I-QTEST:COM: https://i-qtest.com/

Indian High IQ Society: https://inhiqs.org

STAR Intellects High IQ Society: https://starintellects.org

High Range IQ tests by Nitish Joshi: https://njiqtests.weebly.com

CATHOLIQ - High I.Q. Society for Christians: http://catholiq.org/

On High-Ceiling Intelligence Tests by Christopher Michael Langan: http://web.archive.org/web/20020204083531/http://www.megasociety.net/HighCeiling.html

On using multiple tests for high IQ society admissions by Grady Towers: http://web.archive.org/web/19991009210101/http://www.eskimo.com:80/~miyaguch/grady/societies.html

“Just say no” to averaging IQ subtest scores byJoel Schneider and Kevin McGrew: http://www.iapsych.com/iapap101/iap10110.pdf

I.Q. test scores by country on tests by Paul Cooijmans: http://iq-tests-for-the-high-range.com/statistics/iq_by_country.html

Average I.Q values in various European countries by Vinko Buj: link

The Inappropriately Excluded by Michael W. Ferguson: http://polymatharchives.blogspot.hr/2015/01/the-inappropriately-excluded.html

Free Christian books: http://www.traditionalcatholic.co/free-catholicbooks/