Have You Tried Plagiarisma.net?

Plagiarisma.net is a free web-based plagiarism checker that allows students to see if their work is original or if they have borrowed too much from original sources. Obviously, it's also a way to see if student's are cheating on their assignments.

Honestly, this simple to use tool can be helpful to students and teachers alike. There are several ways to check for plagiarism: copy and paste, upload a document, or search by the url. Plagiaisma.net also checks content in a plethora of languages (in other words, too many for me to count).