If you're looking for a LangCSS alternative, Builder.io could be worth a look. It converts Figma designs into web and mobile interfaces with AI-written code. It's got a Visual Copilot tool to refine code, a drag-and-drop editor, and support for React, Vue and Angular, so it's designed to help teams work together and work faster. It's also got component mapping, a global CDN and several pricing plans for teams of different sizes.
Another contender is Noodl, an open-source, AI-augmented low-code foundation for custom apps. Noodl offers visual development, reusable modules and live updates. Its AI generates building blocks, database queries and UI elements, so it's good for prototyping and then scaling web apps with a minimum of code. It's good for people with all skill levels, with lots of documentation and a community for help.
If you're more focused on the user interface side of things, Prototyper could be worth a look. It lets designers and engineers rapidly create and test UIs with AI-assisted design and live iteration. Prototyper has customizable frameworks for React and Tailwind CSS, and it can publish directly to the web. That makes it a fast and easy option for solo designers and enterprise teams.
Last, Uizard is a more general-purpose AI-assisted UI design tool. Uizard is designed to make design easier with features like a text-to-UI generator, drag-and-drop editor and live collaboration. It's good for a variety of design tasks, including mobile and web app designs, wireframes and theme generation, so it's good for product managers, designers and developers.