Which simple SEO program would you need?

Hello!

I'm having a major brain crash at the moment. I would like to create a good SEO program which will help us blackhatters somehow, but I can't find a good idea.

I have 8 year experience with PHP, HTML, CSS, JavaScript, jQuery (since it came out), AJAX, SQL, C#, Java and Photoshop. So I believe I can create a decent program.

Please give me ideas and if it's good and I finish it I will give a free copy to the poster of that idea.

So people, please help me out

Would it be free or paid for?

I don't know yet.. it depends how good that program is probably free for BHW users