Question: I work in a small but growing team of UX designers developing a suite of web applications. It's become obvious that we would benefit from a common pattern library, but are unsure how to get started or what tool we should use.

We want something that we can collaborate on and also share with visual designers and developers - so adding detail such as notes, graphics and snippets of code would be useful.

Has anyone had experience of building a library like this, do you have any tips or recommendations?

Answer: 
There are several [design pattern repositories listed on Konigi web](http://konigi.com/wiki/design-pattern-repositories). From these, [Patternry](http://patternry.com/) allows you to create public and private collections of patterns.
Not a tool that I have got round to using myself yet but [Quince](http://quince.infragistics.com/) seems interesting.

Personally I have found that having my own patterns sketchbook has been very useful, but I think you are looking for something more advanced and collaborative?