EmailNotifier is a add-on for nearly every E-Mail-client. It adds a hidden link to every outgoing message. As soon as the receiver open the message you will be informed. The email-tracking works without approval or help of the receiver.
With Plagiarism-Finder, any Windows-based PC with Internet access can be used to check files for exact phrase matching on the Web. Upon completing the scan, Plagiarism-Finder highlights suspect passages and includes links to matching Web pages.