To develop a real-time chat app with live streaming, you'll need these tools:

1. React Native: For building cross-platform mobile apps (iOS/Android).
2. Node.js: For backend development and server-side logic.
3. Socket.IO: For real-time communication and chat functionality.
4. Agora SDK: For live video and audio streaming.
5. Firebase/Auth0: For user authentication and management.
6. Redis: For scaling chat functionality across multiple users.