I find a git-gui is useful to visualise complex workflows, merge mistakes that have been pushed to the repository, and relative status of various branches simul

I find a git-gui is useful to visualise complex workflows, merge mistakes that have been pushed to the repository, and relative status of various branches simultaneously. That, and the per-chunk/line staging is very useful to do visually, can add/remove lines from the index and see exactly what is going to change on what files (without paging through millions of git diff pages). All of this is possible with the terminal tools, but made much easier with a GUI. It also makes it possible for non-experts to fix problems without just blowing away the repository and repeating work. I'm still using GitX(l) on mac, it keeps dying and being resurrected as a fork, I've always found it the perfect balance between "too simple" and "too complex", and I can just launch it from the terminal "in context" when I need it.