Non-functional Testing

Compatibility - Part 1 - Browser display issues, browser event issues

Compatibility - Part 2 - Multiple platforms, browsers, versions and screen resolution compatibility check using Gomez

Interoperability - Google analytics on user environment details, Database compatibility, Interop with OS and devices

Usability - Ease of use, Simplicity, Clarity, Online help, Configurability, make users feel your application, Consistency