I spend a lot of time in the commmandline, so it makes sense for me to not use a GUI. This alias (in ~/.gitcofig) is gold for most of the "graphical" stuff I'd use something like SourceTree for.

    [alias]
	lg = log --all --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr)%C(bold blue)<%an>%Creset' --abbrev-commit