If you want a tool to build and deploy a web app for free, Bricabrac is worth a look. It uses AI to create web apps from text prompts and offers a no-code editor for customization. You can host the apps for free, and export the code so you're not tied to the service. It's a good choice for building web-based tools and games.
Another option is Replit, a cloud-based service for building, sharing and deploying software as fast as possible. It's got a full-featured environment for building websites and other apps, powerful collaboration tools and AI code generation. Replit offers free hosting with its Starter plan, so it's good for beginners.
If you want to tap into the AI-powered text apps, App Mint AI offers a drag-and-drop interface to build web apps with free hosting on secure servers. You can also download the source code for full customization, so it's a good option for building and publishing text-based experiences.