The following is miscellaneous software development software.
Lex/YACC (actually FLEX and BISON) is a WIN32 version of the classic software for developing parsers and compilers. See my Flex page for some help with it.
A good programmer's editor that works similar to the Visual Studio IDE is Jens File Editor.
The Boost C++ Libraries are very useful. They are used by many, and probably most, experienced C++ programmers. The main reason I have not used them much is that VC versions 6 and prior are not compliant with the C++ standard, so much so that the Boost libraries have problems with the compiler.
WinPcap, The Packet Capture and Network Monitoring Library for Windows "is the industry-standard tool for link-layer network access in Windows environments". It is very useful for low-level network programing.
See my Visual C++ Programmer Stuff page for more C++ stuff.