Comeau Computing (many platforms)
GNU Compiler Collection (many platforms)
Intel (Linux and Windows, x86 and Itanium)
Borland C++ Builder for Windows (Windows)
Borland Kylix (Linux, x86)
Metrowerks Code Warrior (Macintosh and Windows, x86 and PPC)
Microsoft Visual C++ Toolkit 2003 (Windows)
Open Watcom (Windows, OS/2, Netware, DOS)
XCode Tools (Macintosh OS X)
Dinkum (many platforms)
STLport (many platforms)
ACE (ADAPTIVE Communication Environment)