Need help in my portfolio

Isn’t there a library for all the all the bootstrap classes coz here I am trying to design my portfolio and can’t remember which class is to be used for doing what…in all I want to know is there a reference site where I can get all the classes of bootstrap and other stuff used for front-end development??
It will of great help …

You look for ?

yes…and also referencing to w3schools…just asking for any other reference site not only for bootstrap but for jquery and css as well