Over the last few days, I made a server for Git Large File Storage that lets you use Amazon S3 as the storage backend.
If you're unfamiliar with Git LFS, it solves the problem of adding large binary files to Git repositories. It commits the files to the repository as tiny text files that describe where to fetch the file. The actual file data is uploaded to a remote server. In this case, it uses S3 for storage.
For designers, this can be super useful for versioning any kind of design file. Paired with GitHub for Mac/Windows, it should be relatively easy to pick up.
You can check out the project here: https://github.com/meltingice/git-lfs-s3