3. Git
Git, a distributed version control system created by Linus Torvalds to manage the Linux kernel, has very quickly entered the mainstream since its creation less than 3 years ago. The documentation that comes with Git describes it as "a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals."
"If Git isn't the the primary source code management tool for a given open source project right now, someone will have at least created a Git mirror on Github for it," says John Locke, principal consultant at Freelock Computing, a Seattle-based open-source consultancy.
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