Notes on the istream problem with VS2003, VS2005, VS2008 C++ here.
Parsing comand line arguments and configuration files. Emacs syntax highlighting for GetPot files (getpot-mode). Easy to install ! The whole library is contained in one single header file. Easy to use ! Copy/paste all you need from example files. Distributed under GNU MIT License. While not directly linked to license requirements, the author would like this software not to be used for military purposes.
Disclaimer: The name 'GetPot' was chosen with pottery in mind, rather than less innocent consumer goods.