The Article Buddy is a usefull tool for thos needing to rewrite tons of articles or just those that want to offer such service to their users.
Features:
Rewrite Articles based on the Markov Chains Technology (works with english, french, german..)
Granularity grade and Text Length can be defined.

After rewriting an Article a complete readability analasys will appear and give you a better choice to choose a right text.

The Article comparsion will compare 2 existing articles and show you how similar they are in a scale from 0-100

Readability tests used:
Smog Index / Automated Readability Score
Gunning Fog Index Score
Flesch-Kincaid Grade Level
Coleman Liau Index Score

You can read about those methods on wikipedia if you are not familiar.
A Great tool that will save you and others time wil beeing very effective in earning!!!

Note: Some core parts are encrypted but doesnt affect the design.

DEMO:http://underground-revolution.eu/demo/rewriter/

Requirements: PHP 5.1.0 or greater...