Yahoo! has a nice library of design patterns which can be summarized as a list of optimal solutions to common design problems.

Whenever we start to design a new website - an application, we need to decide on lots of things like "what type of pagination I will use, will I use auto-complete for forms and so.

Design Pattern Library

Yahoo! Design Pattern Library aims to answer these questions with providing the generally accepting methods and information. Although tools and logics needed to be used may differ, it is a nice resource for seeing the optimum.