Structural Design Patterns

Decorator

Allows behavior to be added to an individual object either statically or dynamically, without affecting the behavior of other objects from the same class. FileReader in C# is a good example for this. Also check this article from codeproject for C#. Explore the Decorator pattern in JavaScript

Source

Example

Facade

Provides simplified interface to larger body of code such as a class library. Checkout this article by dofactory for C# and addyosmani section for JavaScript.

Source

Composite

Describes that group of objects to be treated same way. The objective is to "compose" objects into tree structures to represent part-whole hierarchies.

Proxy

It's a class acting as an interface to something else. This can be a network connecting, web service or some other resource which is expensive or impossible to duplicate

Module pattern

See (http://en.wikipedia.org/wiki/Module_pattern)

Resources

http://en.wikipedia.org/wiki/Software_design_pattern