A Meteor application is a mix of JavaScript that runs inside a client web browser, JavaScript that runs on the Meteor server inside a Node.js container, and all the supporting HTML fragments, CSS rules, and static assets.
Meteor is a tool in the Build Automation category of a tech stack.
What are some alternatives to Meteor?
npm is the command-line interface to the npm ecosystem. It is battle-tested, surprisingly flexible, and used by hundreds of thousands of JavaScript developers every day.
Visual Studio is a suite of component-based software development tools and other technologies for building powerful, high-performance applications.
Out of the box, IntelliJ IDEA provides a comprehensive feature set including tools and integrations with the most important modern technologies and frameworks for enterprise and web development with Java, Scala, Groovy and other languages.
A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows to load parts for the application on demand. Through "loaders" modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.
Kadira, Passenger, Semantic UI, AngularJS, React and 7 more are some of the popular tools that integrate with Meteor. Here's a list of all 12 tools that integrate with Meteor.