A GitHub contributions graph widget for Übersicht.
Download the zipped folder and unzip it into your widgets folder.
Be sure to change the uname variable from "YOUR GITHUB USERNAME" to your github username.
To rotate go to the index.coffee file and change the rotate variable from 0 to whatever you want. 90 will get you the 90 degree look shown in the screenshot.
This widget is draggable, hold your Übersicht interaction key and click to drag.