tipjar.com is a project of David Nicol who has been working on it off and on since 1996.
He is on twitter as @tipjar
He can be e-mailed at firstname.lastname@example.org. Notice there is no H in his name, nor e-mail address.
The tipjar project can be reached via postal mail at
TIPJAR POST OFFICE BOX 45163 KANSAS CITY, MISSOURI 64171-8163 UNITED STATES OF AMERICA