design patterns

singleton
object pool - re-use -save on obkect creation
factory

commands
chain of resp
iterator


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gang of four patts - authors fo a book - 23 design patterns

Design Patterns: Elements of Reusable Object-Oriented Software

From WIKI:

Design Patterns: Elements of Reusable Object-Oriented Software is a software engineering book describing recurring solutions to common problems in software design. The book's authors are Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides with a foreword by Grady Booch. The authors are often referred to as the Gang of Four, GoF,or Go4

Creational eg factory
Structural adaptor
berhaviour - iterator, command, chain, observer