Cocoa (OS X) vs io.js: 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.
Cocoa (OS X) and io.js belong to "Frameworks (Full Stack)" category of the tech stack.
"Great community " is the top reason why over 2 developers like Cocoa (OS X), while over 6 developers mention "Compatible with NPM" as the leading cause for choosing io.js.