Meteor
Meteor is a full-stack JavaScript framework for building modern web and mobile applications. It integrates front-end, back-end, and database layers using a single language (JavaScript) and provides real-time data synchronization out of the box. The framework emphasizes rapid prototyping and includes built-in tools for development, deployment, and package management.
Developers should learn Meteor when building real-time applications like chat apps, collaborative tools, or live dashboards that require instant data updates across clients. It's particularly useful for startups and small teams due to its fast development cycle and integrated stack, reducing the need to configure separate technologies. Meteor also excels in prototyping and projects where JavaScript consistency across the stack is a priority.