- OpenChallenge - an open challenge for coders. Every three months the results are published under GNU licenses. The winner gets fame, karma, and a cool prize.
- SoftBear Shareware - enter the email contest to win shareware for Windows. Enter the snail mail contest to win a Teddy Bear.
- American Computer Science League (ACSL) - organizes monthly computer programming contests and computer science contests for junior and senior high schools world-wide.
- British Informatics Olympiad - computing competition for schools.
- File - electronic language international festival.
- International Obfuscated C Code Contest - seeks to (dis)honor the most obscure, twisted and obfuscated working C programs.
- Google Code Jam - timed contest where all participants compete online to solve the same problems under the same time constraints.
- Ticket Dog's Banner Contest -
- Programmer Of The Month (POTM) Contest - a contest for programmers that presents a new challenge every 3 or 4 months.
- USA Computing Olympiad - supports pre-college computing around the world through programming competitions and training materials.









