We are happy to announce the latest version of OMNeT++. Highlights of this release: simulation models are now compiled as C++11 sources; we have upgraded the Windows toolchain to MSYS2 and the latest MinGW (this will resolve long-standing issues with the INET build process on Windows); the debut of the opp_test program; and the rewrite of opp_msgc as part of nedtool. There were also numerous bug fixes.