Open Asset Import Library (Short name: Assimp) is a free library to import various well-known 3D model formats into applications. The library has been designed for maximum stability and efficiency. Written in C++, it is licensed under the BSD license. The API is provided for both C and C++. Wrappers for Python and D are available, more bindings are in development. The library loads models in a straightforward in-memory format that can be easily read and processed by applications. Various post processing steps can be executed on the imported data to optimize it for a particular purpose.