Repositories list

• problems

  Public

  cs50/problems’s past year of commit activity
  Checks for check50

  Python

  •287•177•12•5•Updated Jan 24, 2026Jan 24, 2026

• render50

  Public

  cs50/render50’s past year of commit activity
  Python

  •

  GNU General Public License v3.0

  •10•25•4•0•Updated Jan 22, 2026Jan 22, 2026

• style50

  Public
  Python

  •

  GNU General Public License v3.0

  •32•70•14•0•Updated Jan 22, 2026Jan 22, 2026

• submit50

  Public

  cs50/submit50’s past year of commit activity
  This is submit50, CS50's command-line tool for submitting problems.

  Python

  •

  GNU General Public License v3.0

  •1k•506•6•1•Updated Jan 22, 2026Jan 22, 2026

• php-cs50

  Public
  CS50 Library for PHP

  PHP

  •

  MIT License

  •4•11•0•0•Updated Jan 22, 2026Jan 22, 2026

• libcs50-java

  Public

  cs50/libcs50-java’s past year of commit activity
  CS50 Library for Java

  Java

  •

  GNU General Public License v3.0

  •11•23•1•0•Updated Jan 22, 2026Jan 22, 2026

• libcs50

  Public

  cs50/libcs50’s past year of commit activity
  This is CS50's Library for C.

  c

  C

  •

  GNU General Public License v3.0

  •896•2.1k•28•11•Updated Jan 22, 2026Jan 22, 2026

• cli50

  Public

  cs50/cli50’s past year of commit activity
  This is CS50's command-line interface.

  Python

  •

  GNU General Public License v3.0

  •10•23•4•0•Updated Jan 22, 2026Jan 22, 2026

• python-cs50

  Public

  cs50/python-cs50’s past year of commit activity
  This is CS50's library for Python.

  Python

  •

  GNU General Public License v3.0

  •293•806•2•2•Updated Jan 22, 2026Jan 22, 2026

• cs50.vsix

  Public

  cs50/cs50.vsix’s past year of commit activity
  TypeScript

  •

  Other

  •1•8•1•1•Updated Jan 22, 2026Jan 22, 2026

• codespace

  Public
  PHP

  •

  GNU General Public License v3.0

  •425•166•4•2•Updated Jan 21, 2026Jan 21, 2026

• cli

  Public

  cs50/cli’s past year of commit activity
  Dockerfile

  •

  GNU General Public License v3.0

  •20•23•2•1•Updated Jan 20, 2026Jan 20, 2026

• lib50

  Public
  This is lib50, CS50's own internal library used in many of its tools.

  Python

  •

  GNU General Public License v3.0

  •22•23•4•0•Updated Jan 20, 2026Jan 20, 2026

• id

  Public
  Sample code for using CS50 ID to authenticate users via HarvardKey, Princeton CAS, or Yale CAS.

  Python

  •0•5•0•4•Updated Jan 8, 2026Jan 8, 2026

• jekyll-theme-cs50

  Public

  cs50/jekyll-theme-cs50’s past year of commit activity
  This is @cs50's theme for Jekyll. Inspired by https://github.com/poole/hyde.

  jekyll-pluginjekyll-theme

  SCSS

  •

  GNU General Public License v3.0

  •26•28•34•2•Updated Jan 7, 2026Jan 7, 2026

• server

  Public
  HTML

  •

  GNU General Public License v3.0

  •5•23•1•0•Updated Jan 4, 2026Jan 4, 2026

• compare50

  Public

  cs50/compare50’s past year of commit activity
  This is compare50, a fast and extensible plagiarism-detection tool.

  Python

  •

  GNU General Public License v3.0

  •63•229•16•0•Updated Jan 4, 2026Jan 4, 2026

• check50

  Public

  cs50/check50’s past year of commit activity
  This is check50, a command-line program with which you can check the correctness of your programs.

  Python

  •

  GNU General Public License v3.0

  •305•451•13•3•Updated Jan 4, 2026Jan 4, 2026

• help.cs50.net

  Public
  Python

  •

  GNU General Public License v3.0

  •5•8•5•2•Updated Jan 4, 2026Jan 4, 2026

• draw.cs50.io

  Public

  cs50/draw.cs50.io’s past year of commit activity
  JavaScript

  •7•10•2•2•Updated Jan 4, 2026Jan 4, 2026

• lectures

  Public
  Source code for CS50's lectures

  JavaScript

  •154•336•0•0•Updated Jan 2, 2026Jan 2, 2026

• lab50.vsix

  Public

  cs50/lab50.vsix’s past year of commit activity
  Inspired by https://github.com/lostintangent/workspace-layout/

  TypeScript

  •

  GNU General Public License v3.0

  •4•24•5•0•Updated Dec 30, 2025Dec 30, 2025

• help50.vsix

  Public

  cs50/help50.vsix’s past year of commit activity
  TypeScript

  •

  Other

  •0•2•0•0•Updated Dec 30, 2025Dec 30, 2025

• presentation-mode.vsix

  Public

  cs50/presentation-mode.vsix’s past year of commit activity
  TypeScript

  •

  GNU General Public License v3.0

  •0•13•4•0•Updated Dec 30, 2025Dec 30, 2025

• phpliteadmin.vsix

  Public

  cs50/phpliteadmin.vsix’s past year of commit activity
  TypeScript

  •

  Other

  •1•4•0•0•Updated Dec 30, 2025Dec 30, 2025

• extension-uninstaller.vsix

  Public

  cs50/extension-uninstaller.vsix’s past year of commit activity
  TypeScript

  •

  GNU General Public License v3.0

  •1•9•1•0•Updated Dec 30, 2025Dec 30, 2025

• style50.vsix

  Public

  cs50/style50.vsix’s past year of commit activity
  TypeScript

  •

  Other

  •0•5•1•0•Updated Dec 30, 2025Dec 30, 2025

• design50.vsix

  Public

  cs50/design50.vsix’s past year of commit activity
  TypeScript

  •

  Other

  •5•3•0•0•Updated Dec 30, 2025Dec 30, 2025

• explain50.vsix

  Public

  cs50/explain50.vsix’s past year of commit activity
  TypeScript

  •

  GNU General Public License v3.0

  •3•9•1•0•Updated Dec 30, 2025Dec 30, 2025

• ddb50.vsix

  Public
  TypeScript

  •

  GNU General Public License v3.0

  •10•42•3•0•Updated Dec 30, 2025Dec 30, 2025