Turnitin is a tool to used to check for plagiarism. A researcher's work is instantly checked for potential plagiarism by comparing it against the world's largest comparison database using pattern recognition algorithms.
Please contact your supervisor/ style leader to arrange for access.
Refer to the Unisa Policy for Copyright Infringement & Plagiarism for further information
Free plagiarism software
http://www.plagiarism-detect.com/
10 free plagiarism checkers:
http://elearningindustry.com/top-10-free-plagiarism-detection-tools-for-teachers