Visual Studio Code is a free, lightweight editor for Mac, Linux, and Windows and has been getting a lot of praise on Reddit recently. The most common praise I hear for it is that it's what Atom is trying to be.
Just in case: found Git tagging https://git-scm.com/book/en/v2/Git-Basics-Tagging
>Typically people use this functionality to mark release points (v1.0, and so on).
>
>$ git tag
>
>v0.1
>
>v1.3
​