Swift is a programming language invented by Apple and used across all of their devices. It is a strong language, with both functional and object-oriented paradigms. Swift is quickly becoming one of the most popular programming languages of all time because of its elegance, power and simplicity.
Ruby is one of the most popular, and fun to use languages for the web. Ruby was made popular by the Rails framework, so of course we feature a lot of content on not just the ruby programming language, but also tips and tutorials for the Rails framework.
Go is a low-level language invented by Google. It is especially useful for hardware, web, and more recently Android app development. We are just beginning to create content for Go, but you'll find some interesting topics nonetheless.