This one time JK Rowling was found out writing by a pseudonym[1] using this program:
http://evllabs.com/jgaap/w/index.php/Main_Page
[1] http://blogs.wsj.com/speakeasy/2013/07/16/the-science-that-u...
http://evllabs.com/jgaap/w/index.php/Main_Page
[1] http://blogs.wsj.com/speakeasy/2013/07/16/the-science-that-u...
Edit: https://en.wikipedia.org/wiki/The_Cuckoo%27s_Calling#Authors...
> However, it was later reported that Rowling's authorship was leaked to a Times reporter via Twitter by the friend of the wife of a lawyer at Russells Solicitors, who had worked for Rowling. The firm has since apologised[29] and made a "substantial charitable donation" to the Soldiers' Charity as a result of legal action brought by Rowling.[30]