Git X-Modules is Git Submodules done right.

It's a better way to manage modular Git projects. Git X-Modules is a server-side app that syncs your project directories with other repositories.

Git X-Modules is the only server-side solution with zero overhead for Git users:

• An X-Module is a regular directory, synced on your Git server with an external repository.
• When an X-Module is updated, the changes go to the external repository.
• When an external repository is updated, the changes are applied to the X-Module.
• When there are two conflicting updates, Git X-Modules applies one update and turns the other into a pull request.