I hacked together a bash script that prints out all the branches and lets you click on it to switch to it and it's been pretty useful, just wish I could be bothered to make it properly with more features.
I would love GUI tools to complement the command line, instead of replacing it. Already I use the CLI 95% of the time, and launch gitk for that 5% when I really need to see the commit tree graphically. Usually before a merge is the only time I do this.
I wonder if that's a way forward.. a graphical equivalent of "tab completion" when you are trying to write out a command. Instead of a GUI that tries to make git "simpler" by hiding the command-line, how about something that takes the git command you are already trying to write, and helps you write it, e.g. by showing you results of a dry-run on the fly.
Much rather not have a terminal in these apps. It'd probably not match 100% my normal terminal and would slow me down.