Cocoa (OS X) vs Martini: What are the differences?
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; Martini: Classy web framework for Go. Martini is a powerful package for quickly writing modular web applications/services in Golang.
Cocoa (OS X) and Martini can be categorized as "Frameworks (Full Stack)" tools.
"Great community " is the primary reason why developers consider Cocoa (OS X) over the competitors, whereas "Go" was stated as the key factor in picking Martini.
Martini is an open source tool with 10.6K GitHub stars and 1.09K GitHub forks. Here's a link to Martini's open source repository on GitHub.