21-Day Coding Challenge

What it does

Conquer daily JavaScript challenges to skill-up on your coding abilities. Code on your own, or on a team, and be eligible to win more than $10,000 in prizes.

• 
  1Code1Day2025 · 1code1day.app · ▲16

  A daily code challenge

• 
  100 Days of Code2018 · ▲309

  Make coding a habit. Join the growing community.

• 
  24 days of #JavaScriptmas 🎄2020 · ▲24

  📅 Coding advent calendar with daily challenges and prizes

• 
  100DaysOfNoCode Challenge2021 · ▲566

  Learn to no-code in 100 days

• 
  No Code Challenges2020 · ▲201

  A weekly challenge to test your #nocode skills

• 
  JavaScript Learning Roadmap2025 · java-script-learning-roadmap.vercel.app · ▲13

  Master JavaScript in 30 Days—One Project at a Time!

• TL
  The load-bearing vocabulary of Claude▲710

  Life & fun · 16d ago · louisabraham.github.io

• WI
  What if the speed of light was 5 km/h?▲600

  Special relativity simulator in which light crawls along at a human speed, so Lorentz contraction, aberration and Doppler shift happen at walking pace.

  Life & fun · 2d ago · rivendell.dmitrybrant.com

• 
  Articos▲398

  Launch with confidence, not gut instinct

  Life & fun · 17d ago · articos.com

• 
  The same nine streaming subscriptions cost $702/year more than in 2021▲383

  9 major streaming services cost $95.91/mo in 2021-03 and $154.41/mo today — up 61%, or $702 a year. Every change sourced.

  Life & fun · 2d ago · honestlyranked.com

• 
  Nex▲363

  Claude Cowork for high-volume GTM workflows

  Life & fun · 9d ago · nex.ai

• 
  Notify.domains▲321

  Know the moment a domain opportunity appears

  Life & fun · 14d ago · notify.domains

• B
  Bel▲1,288

  Life & fun · 2019 · paulgraham.com

• 
  Vector Illustration Creator▲810

  Create free personalized illustrations from 3000+ elements

  Growth · 2019 · icons8.com

• 
  Open Doodles▲686

  A collection of free sketchy illustrations

  Growth · 2019 · opendoodles.com

• 
  AirPods Pro▲583

  New AirPods with active noise cancellation

  Life & fun · 2019

• 
  The New Ember Mugs▲569

  The next generation of temperature controlled mugs

  Life & fun · 2019

• 
  Lazy IoT▲537

  Control your environment with one easy keyboard shortcut

  Work · 2019