with these features

• Bash, using bash
• C, using clang or gcc
• C++, using clang or g++
• Docker, using docker
• Flask, using flask
• HTML, CSS, and JavaScript, using http-server
• Java, using javac and java
• Lua, using lua
• Node.js, using node
• Python, using python
• R, using R and rstudio
• Ruby, using ruby
• SQLite, using sqlite3
• X Window System, using x11vnc and novnc_proxy

Localized for Chinese, Czech, English, French, German, Italian, Japanese, Korean, Polish, Portuguese, Russian, Spanish, and Turkish.

Environments are based on cs50/codespace, which is based on cs50/cli, which is based on Ubuntu 24.04. Other software can be installed with apt, gem, npm, and pip. Email sysadmins@cs50.harvard.edu with questions.