Referring Tools: 
Wide sample of tools, specially new sites: over 3000
This is site that lets you to find very quickly the right tool for your needs. This application enables people to stay up to date with all the new & hot services that are born daily into the web. In many cases, Go2web20 has been the first to report the existence of a new application.
Target group: 
Web 2.0 users. Language = English.
Positive elements: 
A search engine that searches all the content at the site. Auto-complete for services and tags. Search by multiple tags. Hide-Show for the tagBar for a wider or narrower view. Ability to choose between a gallery or a list view.
Not specific teaching oriented results.