Git
Version controlA tool, not a languageFree & open source
Git isn't a programming language; it's the save-and-undo system used by almost every software project on Earth. It keeps snapshots ("commits") you can always go back to, and lets several lines of work ("branches") grow side by side and then merge back together. Whatever language you code in, you'll use git alongside it.
First released
2005
Created by
Linus Torvalds (who also created Linux)
Fun fact
The first version was written in about ten days
Where you'll see it
Team software projectsGitHub & GitLabOpen sourceUndoing mistakes safely