freeCodeCamp.org's open-source codebase and curriculum. Learn to code for free.

Interactive roadmaps, guides and other educational content to help developers grow in their careers.

"The mother of all demo apps" — Exemplary fullstack Medium.com clone powered by React, Angular, Node, Django, and many more

Skip YouTube video sponsors (browser extension)

A Telegram bot to download files via HTTP(S)/BitTorrent and upload them to Google Drive

A web app to code collaboratively with voice chat in real time. Discord + coding = Discode

Server: Edit and execute handwritten or any code in an image right in your browser.