Shorten.REST - A URL shortener API you can depend on
Suspicious Site Reporter - Report suspicious sites to Google
PixelMe - URL shortener for savvy marketers
XSAlert - XSAlert is a jQuery open-source plugin to enhance your websites with an easy-to-use and fully customizable popup alert It supports many input types, it's responsive, and there are many CSS pre-made themes available
Pixela - Record and Track your habits or effort. All by API.
URLify - Turn your URL's into suspicious looking links