Web 2.0

I'm sure that most people know about Youtube (worldwide video sharing community), Twitter (social networking and micro-blogging service), del.icio.us (stores and manages bookmarked websites and links) and Flickr (website for photo sharing) which are great tools to use for uploading images and bookmarking information and sharing information when browsing the internet.
I have found a website which is a directory for a lot of web 2.0 tools. The site is http://www.go2web20.net/
It has almost everything you can think of ever needing from tools for work related presentations to music networks, gaming networks, search engines, cooking networks and many more.