What are some alternatives?
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
StudioBinder - Production management made modern.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
Shotgun - Production tracking, asset management, and review. Helping your whole team go faster.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Celtx - Celtx is a scriptwriting software platform with applications in a wide range of mediums but that specializes in helping screenwriters.