Aiditorial Article Rewriter is the best article rewriter tool. Aiditorial Article Rewriter provides alot of options to customize the software.
The user manual contains an in depth description of all the major ChimpRewriter functions. It is worth the read for you to fully realise the power you have at your hands.
Download it here: http://chimprewriter.com/support/chimp-rewriter-manual
There is also a link to the manual inside the application itself on the Help tab.
ChimpRewriter - Best Article Rewriter - helps rewrite your article in seconds. ChimpRewriter Article Rewriter checks for duplicate after you rewrite.