http://msdn.microsoft.com/library/default.htm Microsoft Developers Network Online has just about everything from tutorials to keyword and function definitions.
http://www.chesworth.com/pv/vault/frames.htm Dr. Dobbs offers several tutorials explaining basic C++ concepts.
http://www.topcode.com/c++/reference.shtml This site briefly explains OOP terminology and has a list of commonly used keywords.
http://www.dinkumware.com/htm_cpl/index.html This site is a good reference to the standard C++ library with numerous function and class definitions.
http://devcentral.iftech.com/learning/tutorials/c-cpp/c/ A tutorial site for C++ for people who know Pascal or Fortran.
http://www.research.att.com/~bs/homepage.html Home page for Bjarne Stroustrup the creator of C++.
Creating perfect hash functions
This course as taught by the author, Dr. Cliff Shaffer, at Va. Tech.
http://www.scs.carleton.ca/~morin/misc/sortalg/ a collection of sorting algorithms all with java applets to allow comparisons of sorts and relative speeds.