The document summarizes different types of software design patterns. It discusses creational patterns, which deal with object creation mechanisms and increase flexibility. Examples include abstract factory, builder, factory method, prototype and singleton patterns. Structural patterns provide relationships between classes and objects, such as adapter, bridge, composite, and decorator. Behavioral patterns define communication between classes, for example chain of responsibility, command, interpreter, and observer. Design patterns are reusable solutions to common programming problems and increase flexibility and reuse in software design.