C++ Resources
Documentation
cppreference
A C/C++ reference accessible to students
cplusplus.com/C++
A site with a large amount of information regarding the C++ language and libraries
Here
is the standard library reference page of this site
Wikipedia Entry for STL
STL Reference
SGI's comprehensive, somewhat technical reference to the Standatd Template Library
C++'s Standard Template Library implementation is largely based on this
Stroustrup's FAQ on C++ Style and Technique
Another Nice C++ FAQ
C++ Core Guidelines