I use Cygwin bash with git installed - it doesn't work as well as git bash out of the box (some extra configuration to do), nor will it actually launch git gui

I use Cygwin bash with git installed - it doesn't work as well as git bash out of the box (some extra configuration to do), nor will it actually launch git gui without reconfiguring its startup scripts to start an X-server (slow start and shutdown), but it lets you get a mostly full-featured proper shell on Windows.