I've used dropbox+git for sometime [1]. It throws "conflicted copy" error [2] when two people push to origin at the same time. Bitbucket much better than dropbox, but not as awesome as github.
If you have an e-mail address in .edu you can have free private repos with unlimited users having access to them. Just register your .edu e-mail on the site and the 5 user limit is removed.
I've used dropbox+git for sometime [1]. It throws "conflicted copy" error [2] when two people push to origin at the same time. Bitbucket much better than dropbox, but not as awesome as github.
[1] Shorter version - http://stackoverflow.com/a/1961515/45582
[2] http://shikii.net/blog/ignoring-funny-ref-error-on-git-dropb...