Refiner - Customer Feedback Surveys For SaaS
Dimer Beta - Simplest way to write and publish beautiful docs
Simple Form - Simple Form allows you to setup forms with any kind of data
Content Editor 2.0 by Surfer - Content Editor is the most advanced content optimization tool that allows you to write and grade your work.
Survais - Non intrusive micro-surveys
SEO Extension for Google Docs - SEO optimization in Google Docs is now easier than ever.