The list below mentions a few sites related to C++ in general that I personally visit from time to time.

Directories

An impressive directory of C++ resources such as books, articles, FAQs, other C++ pages, compilers, libraries, etc. is compiled and maintained by Bernd Mohr at the Research Centre Jülich , Germany. Whatever you need to know about C++, you'll probably find a link to it in this directory.

The ACCU (Association of C & C++ Users) is a non-profit organisation devoted to professionalism at all levels in C, C++ and Java. There is an excellent and comprehensive list of book reviews available at their site. Also, see their calendar of events .

Online Books
A website maintained by Peter Kitson that hosts online books on C++ that are available for free download.

 
 

Standardization

ISO/IEC
C++ has been standardized by ANSI (The American National Standards Institute), BSI (The British Standards Institute), DIN (The German national standards organization), several other national standards bodies, and ISO (The International Standards Organization). You can find a slightly out-of-date draft standard here. The ISO standard has been finalized and adopted by unanimous vote Nov 14, 1997. It was ratified in August 1998. The standard is ISO/IEC 14882; it is available for downloading at the National Committee for Information Technology Standards Electronic Store. The cost is US$18.00 payable on-line via credit card.

The ISO C++ standards committee maintains an official site with information about the current state of the standards effort. Their webpage has information about the standardization effort, among them a link to the draft version of the current standard and a list of corridenda (corrections/updates/clarifications) voted into the standard in 2002. ISO is in the process of publishing the revised standard (with this corridenda integrated), which will be known as ISO/IEC 14882:2002. It will be available soon as a book : "The C++ Standard", published by Wiley, ISBN 0 470 84674-7.

For further resources related to the language standard go to Jülich Research Center or visit Bjarne Stroustrup's homepage .

Articles and Papers

The C++ Source is a peer-reviewed source of articles for the C++ community.  This online magazine was initiated by a group of  C++ luminaries in 2003/2004 and went online in June 2004.  It hosts articles, tutorials, news, and lots of stuff.  The distinguishing idea is that all submissions undergo a review by seasoned C++ professionals to ensure that the publications are of high quality and of interest.

An archive of articles from the former C/C++ Users Journal magazine featuring articles from 1990 thru 2001.

Guru of the Week is a regular series of C++ programming problems created and written by Herb Sutter. Since 1997, it has been a regular feature of the newsgroup comp.lang.c++.moderated. The articles by Herb Sutter are also worth reading.

Bjarne Stroustrup
The inventor of the C++ programming language maintains a webpage with information related to C++, among them some papers by Bjarne Stroustrup , information related to his book, etc.

Scott Meyers
The author of "Effective C++" maintains a webpage with information related to his work on C++, among them some papers by Scott Meyers , information related to his books, etc.

Andrei Alexandrescu
The author of "Modern C++ Design" maintains a webpage with information related to C++, among them articles by Andrei Alexandrescu , information related to his books, information about the Loki library, etc.

More links to online magazines and collections of papers and articles are available at the Research Center Jülich.

 
 

C++ Libraries

STL (Standard Template Library)
For links to resources related to the STL go to the Jülich Research Center .  It provides links to download sites, tutorial, online references, and many more.

In addition you might want to check out STLFilt , which is an STL error message decryptor implemented by Leor Zolman; it simplifies and/or reformats long-winded error and warning messages and renders many of the cryptic diagnostics comprehensible.

The Boost web site provides a repository for free C++ libraries. The emphasis is on libraries which work well with the C++Standard Library.

ICU (Internation Components for Unicode)
International Components for Unicode (ICU) is an open-source project for providing a full range of services for supporting internationalization. It provides cross-platform C, C++ and Java APIs and is an interesting alternative to the standard C++ internationalization support.