openFrameworks is designed to work as a general purpose glue, and wraps together several commonly used libraries, including: OpenGL, GLEW, GLUT, libtess2 and cairo for graphics rtAudio, PortAudio, OpenAL and Kiss FFT or FMOD for audio input, output and analysis FreeType for fonts FreeImage for image saving and loading Quicktime, GStreamer and videoInput for video playback and grabbing Poco for a variety of utilities OpenCV for computer vision Assimp for 3D model loading The code is written to be massively cross-compatible. Right now we support five operating systems (Windows, OSX, Linux, iOS, Android) and four IDEs (XCode, Code::Blocks, and Visual Studio and Eclipse). The API is designed to be minimal and easy to grasp.