The Amazing Pattern Library
The Amazing Pattern Library, started by Tim Holman and Claudio Guglierei, is an on going project that complies patterns shared by the most talented designers out there for you to use freely in your designs. The collection of patterns and the quality is top notch. I will definitely be using some of the patterns in my future design and I am sure you will do too.
For more information visit http://thepatternlibrary.com/