DesignPattern

1.Creational Design Pattern

Factory Pattern
Abstract Factory Pattern
Singleton Pattern
Prototype Pattern
Builder Pattern

2. Structural Design Pattern

Adapter Pattern
Decorator Pattern
Bridge Pattern
Composite Pattern
Facade Pattern
Flyweight Pattern
Proxy Pattern

3. Behavioral Design Pattern

Observer Pattern
Chain Of Responsibility Pattern
Command Pattern
Interpreter Pattern
Iterator Pattern
Mediator Pattern
Memento Pattern
State Pattern
Strategy Pattern
Template Pattern
Visitor Pattern

Benefit of using design patterns:

1. Promotes reusability that leads to more robust and highly maintainable code.
2. Helps in reducing total cost of ownership (TCO) of the software product.
3. It makes our code easy to understand and debug.
4. Leads to faster development and new members of team can understand it easily and quickly.

Links should refer:

1. Link1