uSync in an umbraco package that takes the bits of umbraco that are stored in a database and moves them to disk, so you can source control, copy and move your umbraco site between computers and servers.
uSync will read/write:
Stylesheets (no longer stored in the db in umbraco 7.3+)
Read the uSync documentation here : usync.readthedocs.io
Whenever you make a change usync can write that out to disk, so you can check it in with all your other changes, uSync will also import everything from disk so when you checkout other people’s code, their changes will be reflected on your build.
uSync isn’t a deployment system, but with everything written out to disk, ready for import you can copy the files over to your target systems and run imports to make changes. To run uSync as part of your deployment you will probably want to tweak a few settings.
I do try to be good with version control, but it’s can get confusing when targeting so many different versions of umbraco - as of V7.4 of umbraco these are the current editions of uSync for each version.
Check out the Docs for details of what version to install for Older Umbraco versions.
uSync.ContentEdition : Adds the ability to sync content and media items as part of uSync
uSync.Snapshots: Allows you to take moment in time snapshots of changes you have made
uSync.Core (below) : The core usync engine & API - allowing you to write your own syncing routines