Cocoa (OS X) vs Trailblazer: What are the differences?
Developers describe Cocoa (OS X) as "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. On the other hand, Trailblazer is detailed as "A new architecture for Rails". Trailblazer is a thin layer on top of Rails. It gently enforces encapsulation, an intuitive code structure and gives you an object-oriented architecture. In a nutshell: Trailblazer makes you write logicless models that purely act as data objects, don't contain callbacks, nested attributes, validations or domain logic. It removes bulky controllers and strong_parameters by supplying additional layers to hold that code and completely replaces helpers.
Cocoa (OS X) and Trailblazer can be categorized as "Frameworks (Full Stack)" tools.
"Great community " is the top reason why over 2 developers like Cocoa (OS X), while over 3 developers mention "Trailblazer allows creating sane, large apps in Rails" as the leading cause for choosing Trailblazer.
Trailblazer is an open source tool with 2.91K GitHub stars and 129 GitHub forks. Here's a link to Trailblazer's open source repository on GitHub.