| Type | Design Pattern | Description |
| Creational | Singleton | Ensures a class has only one instance. |
| Factory Method | Defines an interface for creating objects but lets subclasses decide the instantiation. |
| Abstract Factory | Provides an interface for creating families of related objects. |
| Builder | Separates object construction from its representation. |
| Prototype | Creates new objects by copying an existing object. |
| Structural | Adapter | Allows incompatible interfaces to work together. |
| Bridge | Decouples abstraction from implementation. |
| Composite | Organizes objects into tree structures. |
| Decorator | Adds new behaviors to objects dynamically. |
| Facade | Provides a simplified interface to a complex system. |
| Flyweight | Minimizes memory usage by sharing objects. |
| Proxy | Controls access to another object. |
| Behavioral | Chain of Responsibility | Passes a request along a chain of handlers. |
| Command | Encapsulates a request as an object. |
| Interpreter | Defines a grammar and an interpreter for a language. |
| Iterator | Provides sequential access to elements of a collection. |
| Mediator | Centralizes communication between objects. |
| Memento | Captures and restores an object’s state. |
| Observer | Notifies dependent objects of state changes. |
| State | Allows an object to change behavior when its state changes. |
| Strategy | Defines interchangeable algorithms. |
| Template Method | Defines the skeleton of an algorithm, allowing steps to be customized. |
| Visitor | Allows adding new operations to objects without modifying them. |