W3Docs created a new interface which is much more comfortable for its users.
In the top bar of the Menu you can see sections Tools and Quizzes.
In those pages the list of all Tools and Quizzes is shown.
Here is the Quizzes list.
In the inner pages of the website you can see dropdown manu Books where our tutorials are listed.
As you have already noticed the design of our website is changed so you can see all the Tools using the new feature of Slider as well as to see the Tools according to their tags.