Cross-Platform 2D C++ game engine
oxygine-framework-all-in-one
Download Archive includes already configured version of oxygine-framework with SDL2, oxygine-sound, oxygine-flow, oxygine-freetype and precompiled binaries.
oxygine-editor
Download Archive includes MacOSX and Win32 build and examples.
You could always check Oxygine development on GitHub.