I am working on web-based applications to manage search engine optimization (SEO) efforts. My products are for SEO professionals, website owners and SEO agencies.

Some of my tool used at enterprise level are :

1. Keyword Density Checker
2. Keyword Suggestions Tool
3. Duplicate Content Checker
4. Article Spinning
5. URL Rewriting Tool
6. Search Engine Spider Simulator
7. Alexa Ranking Tool
8. Reciprocal Link Checker

In case you need any of the above tools for your reference, please use this form. I will be more then eager to share the api with you.