OpenVINO™ toolkit provides a set of pre-trained and public models that you can use for learning and demo purposes or for developing deep learning software. The most recent version is available in the following repo on Github.
The models are also available at the following location in your OpenVINO installation folder:
There are two directories inside this folder - intel and public. The intel directory contains Intel pre-trained models while the public folder contains public models. There are numerous face detection models that you can choose from.
More information is available at the following page: