Best software or tool to check copied content

If you are looking for the best tools and software available to check whether content is copied or spun then you may go through the following websites to get the things done.

Best sites for checking copied or spun contents
www.copyscape.com/
www.smallseotools.com/plagiarism-checker/
www.plagiarisma.net/

You can use Google Search for checking copied content. For more accurate results, you can use this search operator - "". Techulator also uses this search operator for checking copied content. For example - search, "copied content text".
If you want to check article spinning, then use copyscape.com