I created some useful web tools myself on my web - http://www.vexez.com take a look, free to use, would be glad to hear comments and suggestions.. still trying to improve..
Update on some tools on my site.. - Vexez Content Spinner - Vexez Content Unspinner - Vexez Keyword Density Calculator They should be working fine now, still improving... Try it out, give me some feedbacks.. Thanks!