In software engineering, a design pattern is a general repeatable solutions to a commonly occurring problem in software design. A design pattern isn't a finished design that can be transformed directly into code. It is a description or template for how to solve a problem that can be used in many different situations.

Generally design pattern can be broken down into three types.

1. Creational
2. Structural
3. Behavioral

1. Adapter
2. Decorator
3. Dependency Injection
4. Facade
5. Factory
6. Iterator
7. Observer
8. Proxy
9. Singleton
10. Strategy