Git X-Modules is a new product by TMate Software. We call it "Submodules – done right".

Have you ever been struggling with code spread between several repositories?

If yes, then you probably know, how troublesome the native Git Submodules could be. There a few alternatives, but none of them removes the burden from the end user completely or is a fully supported commercial product.

We used our repository mirror technology, perfected by SubGit and SVN Mirror, to create a new solution for this case - totally server-side.

• Add modules, selecting a branch, and a path to include.
• No need to run any special commands or follow a specific sequence of actions.
• Users make no difference between external (module) files and their "parent" repository.
• One `git push` and `git pull` is good for all.
• Any Git client is supported out of the box.
• All updates to the external (module) repositories are fetched automatically.
• Various ways to insert commits from external modules into the "parent" history.
• Your favorite TMate Support!

Git X-Modules exists as an app for Atlassian Bitbucket Server / Data Center, and as a free Open Source command-line tool.
Dedicated plugins for GitLab and other Git servers are coming soon!