Онлайн редакторы кода

Frontend - простые демки

• https://codepen.io (opens new window) CodePen
• https://jsbin.com (opens new window) jsBin
• https://jsfiddle.net (opens new window) jsFiddle

Frontend и Backend приложения

• https://stackblitz.com (opens new window) StackBlitz
• https://codesandbox.io (opens new window) CodeSandbox

Node.js

• https://replit.com/languages/nodejs (opens new window) Node.js online editor

Совместаная работа

• https://codeinterview.io/ (opens new window) Pair Programming for Interviews