Catalog of Patterns of Enterprise Application Architecture - Martin Fowler

  One of my Essential Resources on Understanding Software Design Patterns

Domain Logic Patterns: Transaction Script (110), Domain Model (116), Table Module (125), Service Layer (133).

Data Source Architectural Patterns: Table Data Gateway (144), Row Data Gateway (152), Active Record (160), Data Mapper (165).

Object-Relational Behavioral Patterns: Unit of Work (184), Identity Map (195), Lazy Load (200)

Object-Relational Structural Patterns: Identity Field (216), Foreign Key Mapping (236), Association Table Mapping (248), Dependent Mapping (262), Embedded Value (268), Serialized LOB (272), Single Table Inheritance (278), Class Table Inheritance (285), Concrete Table Inheritance (293), Inheritance Mappers (302).

Object-Relational Metadata Mapping Patterns: Metadata Mapping (306), Query Object (316), Repository (322).

Web Presentation Patterns: Model View Controller (330), Page Controller (333), Front Controller (344), Template View (350), Transform View (361), Two-Step View (365), Application Controller (379).

Distribution Patterns: Remote Facade (388), Data Transfer Object (401)

Offline Concurrency Patterns: Optimistic Offline Lock (416), Pessimistic Offline Lock (426), Coarse Grained Lock (438), Implicit Lock (449).

Session State Patterns: Client Session State (456), Server Session State (458), Database Session State (462).

Base Patterns: Gateway (466), Mapper (473), Layer Supertype (475), Separated Interface (476), Registry (480), Value Object (486), Money (488), Special Case (496), Plugin (499), Service Stub (504), Record Set (508)