Ether and Quadratic Ether 

The Ether Canonizer algorithm allows people to “vote their Ether.” In order for their Ether to be counted, users must verify their Ether ownership by going to the “Ether Ownership” tab on the Account Settings page. These verified, real-time values are used for both the Ether Canonizer Algorithm and the Quadratic Ether Canonizer algorithm. (Quadratic Ether = square root of Ether.)

Source code for all algorithms can be found on GitHub.