[astronautlevel]

Not going to get into the version control system argument here, other than to use Git.

Now, a couple of other things -

GitKraken is my GUI client of choice when I use a GUI client, but the git command line program is fantastic and actually extremely easy to use. Eclipse also has built in support for Git through E-Git, though it's not great it's helpful if you already have eclipse and don't want to install anything extra.

Another hosting alternative is GitLab, which besides providing servers also provides a community edition, which lets you install GitLab and self-host it on any machine/VPS. We used it last year and it was incredibly powerful.