Open Science Framework (OSF) is a free and open source project management tool that supports researchers throughout their entire project lifecycle. OSF is developed and maintained by the Center for Open Science with the intention of fostering "openness, integrity, and reproducibility of research."
A project in OSF can be an experiment, a lab group, or a paper—anything that has contributing members and files or explanatory texts/images. It is a highly adaptable framework. Projects and just parts of projects (for example, data sets) can be made public and open or restricted at any stage.
Image of the Open Science Framework project page:
Manage files, data, code, and protocols in one centralized location and easily build custom organization for your project — no more trawling emails to find files or scrambling to recover lost data.
Manage which parts of a project are public or private, making it easy to collaborate and share with the community or just your team.
Connect your favorite third-party services like Dropbox or Google Drive, automate version control, preregister your research, share preprints.
OSF's preservation fund is sufficient for 50+ years of read access hosting at present costs.