Tags-for-std-cpp-STL-streams-... is a project mainly written in C and C++, it's free.
Modified libstdc++ headers for use with ctags
This is a mirror of http://www.vim.org/scripts/script.php?script_id=2358
This is a slightly modified version of the libstdc++ headers which can be used with ctags. STL, streams and other standard cpp stuff can now be completed with omnicpp complete: http://www.vim.org/scripts/script.php?script_id=1520