• License: GPLv2 or later
• License URI: http://www.gnu.org/licenses/gpl-2.0.html

Shows the git branch you are currently on in the Toolbar.

1. Upload show-git-branch to the /wp-content/plugins/ directory
2. Activate the plugin through the 'Plugins' menu in WordPress

I don't know - let me know.

1. A screenshot of the Toolbar.