Open Science Framework (OSF) is part version control system, and part collaboration software that allows researchers to move study materials to the cloud, share and find materials, detail individual contributions, make research design more visible and register materials to certify research design was not modified to alter outcomes. To increase workflow flexibility OSF offers a structured yet open system where researchers can post a description of their study and its goals. The OSF emphasizes versatility with a very wide range of tools and features including ad-ons from other related sites such as dataverse and github.