Platforms
Windows, Mac, Linux, Android, iOS, Windows Phone, Sailfish, Blackberry
Versioning systems
Git, Perforce, SVN, Microsoft Visual SourceSafe
Frameworks/Libraries
Qt, STL, Boost, .NET, libtorrent, MFC, ATL, WTL, wxWidgets, FFmpeg, Ogre3d, OpenGL, DirectX, OpenCL, OpenSSL, Crypto++, gSOAP, OpenMP, IPP, MPI, Protobuf, TBB, OpenCV, NaCl
Databases
Microsoft SQL Server, MySQL, MongoDB, DB2, PostgreSQL, SQLite, Sybase, FireBird
IDE
Visual Studio, Eclipse, Qt Creator, Xcode.
Refactoring tools
ReSharper, Visual Assist
Versioning systems
Git, Perforce, SVN, Microsoft Visual SourceSafe
Static code analysis
cppcheck, Visual Studio, PVS-Studio
Build tools
CMake, QMake, Ninja, Make, NMAKE, GYP
Debuggers
MSVC Dbg, Valgrind, WinDbg, GDB
Code-formatting tools
AStyle, Uncrustify