Welie: Patterns in interaction design

About a year ago I had to make an essay for my studies here, about web interfaces and the way they act with human. I had to make an analysis of some web interfaces based on some criteria and an important weight was given at Welie's interaction design patterns. Here is a few word from the author:

This site contains a lot of best practices in Interaction Design. Over the years I have collected examples and insight on their applicability that I share with you here on this. So there is really no 'original' design to be found here, sorry. It has all been done before... See it as a reference or basic 'toolkit' you can use when design user experiences. It is no substitute for creative design, it simply seeks to describe what we know and have learned about solutions you will find abundantly on the web and even beyond. Every 'solution' described in these patterns may succeed in one context but may also fail in another. The challenge is to understand why and how it depends on elements of the context of use. I give you my opinion here, but may opinion is also subject to new insight...so this site will be updated!