CloudShell - Cloud Shell is a free admin machine with browser-based command-line access for managing your infrastructure and applications on Google Cloud Platform.
GitHub Codespaces - GItHub Codespaces is a hosted remote coding environment by GitHub based on Visual Studio Codespaces integrated directly for GitHub.
Slingcode - Slingcode is a simple yet robust personal computing platform stacked in one HTML file.
StackHive - Design, develop or publish websites right from your browser
StackBlitz - Online VS Code Editor for Angular and React
Djit.su - Djit.su is a development environment where you can write and deploy your code. Host a website that you code on Djit.su for free in a single click. Djit.su is the PhotoShop of coding.