I am bad at remembering what header file I need to include to use which standard library facility. I can handle the obvious ones like vector, but that still leaves many where I have to go and look it up. To make looking it up a little easier, I have created a page that lists all of the symbols in the standard library sorted by various criteria – including what header file they are in. There is a C++98 version and a C++11 version. I am sure there are mistakes in the pages, I will correct any mistakes I am told about.

C++11 Standard Library Symbols
C++98 Standard Library Symbols