Cocoa (OS X) vs Vaadin: What are the differences?
What is Cocoa (OS X)? The Cocoa frameworks consist of libraries, APIs, and runtimes that form the development layer for all of OS X. Much of Cocoa is implemented in Objective-C, an object-oriented language that is compiled to run at incredible speed, yet employs a truly dynamic runtime making it uniquely flexible. Because Objective-C is a superset of C, it is easy to mix C and even C++ into your Cocoa applications.
What is Vaadin? Components and tools for building web apps in Java. It is the fastest way to build web applications in Java. It automates the communication between your server and the browser and gives you a high-level component API for all Vaadin components.
Cocoa (OS X) and Vaadin can be categorized as "Frameworks (Full Stack)" tools.