VS 2015 Update 3 is now available for download, including the updated Community edition. The Visual C++ 2015 Update 3 Redistribution packages are also available (x86, x64), as well as the Remote Debugging Tools (x86, x64, ARM). For more information see the Visual Studio Team Blog. Be sure to read the release notes.
Compiler and CRT
VS 2015 Update 3 includes a new version of the C/C++ compiler (19.00.24215.1 with the latest hot-fixes applied). There is also a new version of the C/C++ Runtime (14.0.24212). See these posts for details about the compiler, optimizer, libraries, and standards compliance including expression SFINAE.
Visual C++ Build Tools 2015: There is an edition of Visual Studio available without the IDE for those just looking for the compiler toolset.