Sublime Text 3 is a minimalist coding editor that will let you focus completely on your code.
Sublime Text works by focusing on what it really important - the code - and leaves the other types of eye candy out. The minimalist interface that can be customized with a dozen different color schemes. It also includes a really handy mini map on the right side, which enables you to quickly move from top to bottom in your code. This isn't seen in other code editors and is a really big plus.
Even though Sublime Text is seriously pared-back, don't make the mistake of thinking that it lacks features. This programming editor supports most coding languages and can work with multiple documents at the same time, each one on a different tab.
Syntax highlighting, code snippets, and multiple selection will make your work easier. Sublime Text plug-ins are also a major help, allowing you to add endless possibilities to the application - oh, but it doesn't support Zen Coding.
In its last version, Sublime Text was accused of being a little difficult to get into. While it's still not for programming novices, there's plenty of online support and help, so you should never be too far from a word of advice.
If you're looking for a minimalist, efficient coding editor with support for multiple programming languages, Sublime Text may be what you need.