|Project Euler is a series of challenging mathematical/computer programming problems that will require more than just mathematical insights to solve.
|The Eudyptula Challenge
|The Eudyptula Challenge was a series of programming exercises for the Linux kernel
|The Cryptopals Crypto Challenges
|We’ve built a collection of exercises that demonstrate attacks on real-world crypto.
|The Monad Challenges
|Monads cannot be taught. They must be discovered
|The Deadlock Empire
|solve for deadlocks
|Advent of Code 2021
|Advent of Code is an annual set of Christmas-themed computer programming challenges
|The Computer Language Benchmarks Game
|A free software project for comparing how a given subset of simple algorithms can be implemented in various popular programming languages.
|Rosetta Code is a programming chrestomathy site.
|The SQL Murder Mystery
|Can you find out whodunnit?
|It’s a crossword puzzle where you need to fill in the hexes with character sequences, so that they match the regular expressions listed around the edges.
|The Case of the 50ms request
|This is a mystery where your goal is to solve a debugging problem! You’ll collect clues, interpret evidence, and ultimately solve the Case of the 50ms Request!
|Al Zimmermann’s Programming Contests
|Demented computer programmers compete for glory and for the adulation of their peers.
|Hanukkah of Data
|The Case of the Slow Websites
|A mystery where your goal is to solve a debugging problem! You’ll collect clues, interpret evidence, and ultimately solve the Case of the Slow Websites!
|Server programming challenge.
|Code Golf is a game designed to let you show off your code-fu by solving problems in the least number of characters.
|IPv4 Turf War
|Claim The Land At 126.96.36.199
|The elevator programming game!
|Learn CPU architecture with puzzles
|Troubleshooting Linux Servers
|alert(1) to win
|A multiplayer game where your code is the controller.
|Tiny Code Christmas
|an event to help you take your first steps in demoscene sizecoding with Lua based fantasy consoles
|Five Hundred Words
|Web application which helps people grow in the practice of habitual writing.
|Daily social mapping project happening every November
|The Photographical History Game
|100 Days To Offload
|Can you publish 100 posts on your blog in a year?
|Wheel of Misfortune
|Busy Beaver Challenge
|The goal of the Busy Beaver Challenge (bbchallenge for short) is to collaboratively prove or disprove the following conjecture [Aaronson, 2020]
|Gossip Glomers · Fly
|A series of distributed systems challenges brought to you by Fly.io. stream by Jon G.
|Hard, no-nonsense programming challenges
|1.3B Worldcat scrape
|Wordcat scrape and data science mini competition
|PID control challenge
|50 small prank programs for kids and adults
|CTF for Architecture Notes