Replit

replit.com

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Browser-based coding environment with an integrated AI agent that can scaffold, build, and deploy full applications from a natural-language prompt.

Why it is useful

Replit removes the local setup step entirely — you get a full dev environment, hosting, and a database in the browser. The AI agent can go from a plain-English description to a working, deployed app, making it a fast way to prototype without configuring anything locally.